North American Network Operators Group

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Weekly Routing Table Report

  • From: Routing Table Analysis
  • Date: Fri Mar 25 13:10:40 2005

This is an automated weekly mailing describing the state of the Internet
Routing Table as seen from APNIC's router in Japan.
Daily listings are sent to bgp-stats@lists.apnic.net

If you have any comments please contact Philip Smith <pfs@cisco.com>.

Routing Table Report   04:00 +10GMT Sat 26 Mar, 2005

Analysis Summary
----------------

BGP routing table entries examined:                              158533
    Prefixes after maximum aggregation:                           92562
    Unique aggregates announced to Internet:                      76294
Total ASes present in the Internet Routing Table:                 19241
Origin-only ASes present in the Internet Routing Table:           16738
Origin ASes announcing only one prefix:                            7786
Transit ASes present in the Internet Routing Table:                2503
Transit-only ASes present in the Internet Routing Table:             73
Average AS path length visible in the Internet Routing Table:       4.5
    Max AS path length visible:                                      21
Prefixes from unregistered ASNs in the Routing Table:                29
Special use prefixes present in the Routing Table:                    0
Prefixes being announced from unallocated address space:             13
Number of addresses announced to Internet:                   1390054164
    Equivalent to 82 /8s, 218 /16s and 139 /24s
    Percentage of available address space announced:               37.5
    Percentage of allocated address space announced:               59.3
    Percentage of available address space allocated:               63.2
Total number of prefixes smaller than registry allocations:       73966

APNIC Region Analysis Summary
-----------------------------

Prefixes being announced by APNIC Region ASes:                    32079
    Total APNIC prefixes after maximum aggregation:               15262
Prefixes being announced from the APNIC address blocks:           29996
    Unique aggregates announced from the APNIC address blocks:    15266
APNIC Region origin ASes present in the Internet Routing Table:    2228
APNIC Region origin ASes announcing only one prefix:                644
APNIC Region transit ASes present in the Internet Routing Table:    334
Average APNIC Region AS path length visible:                        4.4
    Max APNIC Region AS path length visible:                         16
Number of APNIC addresses announced to Internet:              179568000
    Equivalent to 10 /8s, 179 /16s and 253 /24s
    Percentage of available APNIC address space announced:         66.6

APNIC AS Blocks        4608-4864, 7467-7722, 9216-10239, 17408-18431
                       23552-24575
APNIC Address Blocks   58/7, 60/7, 124/7, 126/8, 202/7, 210/7, 218/7,
                       220/7 and 222/8

ARIN Region Analysis Summary
----------------------------

Prefixes being announced by ARIN Region ASes:                     86303
    Total ARIN prefixes after maximum aggregation:                52803
Prefixes being announced from the ARIN address blocks:            67323
    Unique aggregates announced from the ARIN address blocks:     24776
ARIN Region origin ASes present in the Internet Routing Table:     9783
ARIN Region origin ASes announcing only one prefix:                3537
ARIN Region transit ASes present in the Internet Routing Table:     932
Average ARIN Region AS path length visible:                         4.3
    Max ARIN Region AS path length visible:                          21
Number of ARIN addresses announced to Internet:               243068928
    Equivalent to 14 /8s, 124 /16s and 240 /24s
    Percentage of available ARIN address space announced:          72.4

ARIN AS Blocks         1-1876, 1902-2042, 2044-2046, 2048-2106
                       2138-2584, 2615-2772, 2823-2829, 2880-3153
                       3354-4607, 4865-5119, 5632-6655, 6912-7466
                       7723-8191, 10240-12287, 13312-15359, 16384-17407
                       18432-20479, 21504-23551, 25600-26591,
                       26624-27647, 29696-30719, 31744-33791
ARIN Address Blocks    24/8, 63/8, 64/6, 68/7, 70/7, 72/8, 198/7, 204/6,
                       208/7 and 216/8

RIPE Region Analysis Summary
----------------------------

Prefixes being announced by RIPE Region ASes:                     30239
    Total RIPE prefixes after maximum aggregation:                20782
Prefixes being announced from the RIPE address blocks:            27240
    Unique aggregates announced from the RIPE address blocks:     18009
RIPE Region origin ASes present in the Internet Routing Table:     6460
RIPE Region origin ASes announcing only one prefix:                3394
RIPE Region transit ASes present in the Internet Routing Table:    1088
Average RIPE Region AS path length visible:                         5.1
    Max RIPE Region AS path length visible:                          21
Number of RIPE addresses announced to Internet:               196673216
    Equivalent to 11 /8s, 184 /16s and 254 /24s
    Percentage of available RIPE address space announced:          69.0

RIPE AS Blocks         1877-1901, 2043, 2047, 2107-2136, 2585-2614
                       2773-2822, 2830-2879, 3154-3353, 5377-5631
                       6656-6911, 8192-9215, 12288-13311, 15360-16383
                       20480-21503, 24576-25599, 28672-29695
                       30720-31743, 33792-35839
RIPE Address Blocks    62/8, 80/5, 88/8, 188/8, 193/8, 194/7, 212/7
                       and 217/8

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes:                    8489
    Total LACNIC prefixes after maximum aggregation:               3019
Prefixes being announced from the LACNIC address blocks:           6926
    Unique aggregates announced from the LACNIC address blocks:    3999
LACNIC Region origin ASes present in the Internet Routing Table:    606
LACNIC Region origin ASes announcing only one prefix:               188
LACNIC Region transit ASes present in the Internet Routing Table:   110
Average LACNIC Region AS path length visible:                       5.1
    Max LACNIC Region AS path length visible:                        19
Number of LACNIC addresses announced to Internet:              17826048
    Equivalent to 1 /8s, 16 /16s and 1 /24s
    Percentage of available LACNIC address space announced:        53.1

LACNIC AS Blocks       26592-26623, 27648-28671
LACNIC Address Blocks  200/7

Emerging AfriNIC Region Analysis Summary
----------------------------------------

Prefixes being announced by AfriNIC Region ASes:                   1393
    Total AfriNIC prefixes after maximum aggregation:               696
Prefixes being announced from the AfriNIC address blocks:           902
    Unique aggregates announced from the AfriNIC address blocks:    721
AfriNIC Region origin ASes present in the Internet Routing Table:    96
AfriNIC Region origin ASes announcing only one prefix:               23
AfriNIC Region transit ASes present in the Internet Routing Table:   13
Average AfriNIC Region AS path length visible:                      4.5
    Max AfriNIC Region AS path length visible:                       12
Number of AfriNIC addresses announced to Internet:              2190336
    Equivalent to 0 /8s, 33 /16s and 108 /24s
    Percentage of available AfriNIC address space announced:       13.1

AfriNIC AS Blocks      <none>
AfriNIC Address Blocks 196/8

APNIC Region per AS prefix count summary
----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 4134      894       4777         178   CHINANET-BACKBONE
 1221      785       1191         558   Telstra Pty Ltd
 9583      631         50          32   Sify Limited
 4766      584       3415         275   Korea Telecom (KIX)
 4755      501        242         105   Videsh Sanchar Nigam Ltd. Aut
 7545      485         86          70   TPG Internet Pty Ltd
17676      425       6428          74   Softbank BB Corp.
 9443      374         77          79   Primus Telecommunications
 9929      358        175          45   China Netcom Corp.
 2907      345       1823         319   SINET Japan
17557      337         24         155   Pakistan Telecom
10036      306         28         279   C&M Communication Co. Ltd.
 4808      300        247         161   CNCGROUP IP network: China169
 7474      291        268         211   SingTel Optus Pty Ltd
 4802      283         47         167   Wantree Development
 9498      262         82          53   BHARTI BT INTERNET LTD.
 2764      255        238         203   AAPT Limited
  703      249        279         207   UUNET - Commercial IP service
 9800      235        386          69   CHINA UNICOM
17974      235         63          12   PT TELEKOMUNIKASI INDONESIA

ARIN Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 7018     1477       6562         966   AT&T WorldNet Services
  721     1119      21763         314   DLA Systems Automation Center
 4323     1085        663         224   Time Warner Telecom
  701     1018       8283         867   UUNET Technologies, Inc. 
  174      932       5570         791   Cogent Communications
 1239      915       2868         661   Sprint 
 6197      880        383         412   BellSouth Network Solutions, 
 2386      829        500         612   AT&T Data Communications Serv
18566      780        208           6   Covad Communications 
  209      635       3476         500   Qwest 
20115      592        492         309   Charter Communications 
 3356      582      10867         430   Level 3 Communications, LLC 
  852      540       1095         399   Telus Advanced Communications
 3561      538       2370         414   Savvis
 3602      506        121          93   Sprint Canada, Inc. 
 6478      498        833         115   AT&T Worldnet Services 
22773      475       1188          21   Cox Communications, Inc.
 5668      473        115          26   CenturyTel Internet Holdings,
 6198      470        567         191   BellSouth Network Solutions, 
27364      465         43          18   Armstrong Cable Services 

RIPE Region per AS prefix count summary
---------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
  702      603       2004         493   UUNET - Commercial IP service
 3320      296       2992         231   Deutsche Telekom AG
 3301      289       1116         279   TeliaNet Sweden
 8220      276        466         270   COLT Telecommunications
  680      254       2041         239   DFN-IP service G-WiN
 3246      231        475         225   Song Networks
 8708      222        251         203   Romania Data Systems S.A.
13083      218         51           8   Mannesmann Datenverarbeitung 
 9121      206        239          45   TTnet Autonomous System
 1257      201        712         177   SWIPnet Swedish IP Network
 5515      178        778         128   Sonera Solution Autonomous Sy
  786      176       1794         176   The JANET IP Service
 3269      166       1456          72   TELECOM ITALIA
 6746      162         47         142   Dynamic Network Technologies,
  719      158        322          99   LANLINK autonomous system
 8866      155         20           7   Bulgarian Telecommunication C
 3300      153        184          86   AUCS Communications Services 
 6830      143        529          28   UPC Distribution Services
 5400      142        281         124   BT Ignite European Backbone
25186      142        138         100   France Telecom Transpac's Tra

LACNIC Region per AS prefix count summary
-----------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 8151      340        489         142   UniNet S.A. de C.V. 
16814      233         14           6   NSS, S.A. 
11172      214         99          52   Servicios Alestra S.A de C.V 
 6147      205        102          20   Telefonica Del Peru 
19632      191         14           7   Metropolis Intercom S.A. 
11664      149         19          23   Keytech SA 
 7303      147         67          31   Telecom Argentina Stet-France
 6505      132         90          88   Global One Communicaoes Ltda 
14117      119          8           4   Telefonica del Sur S.A. 
22047      116         96           6   VTR PUNTO NET S.A. 
18822      102          6          14   TELEFONICA MANQUEHUE 
 6503      101        144          71   AVANTEL, S.A. 
13999      100         52           9   Mega Cable S.A. de C.V. 
11556       98         49           4   Cable-Wireless Panama 
19169       92          6          16   Telconet 
23216       88         24          24   RAMtelecom Telecomunicaciones
 6535       87          7          23   Chilesat Servicios  Empresari
11311       86          8          22   Sinectis S.A. 
 5639       84         12           9   Telecommunications Services o
10481       80         32           7   Prima S.A. 

AfriNIC Region per AS prefix count summary
------------------------------------------

  ASN   No of nets  /20 equiv  MaxAgg  Description
 3741      268        635         225   The Internet Solution 
 5536      114         15          18   Internet Egypt Network
20928       91         16           2   Noor Advanced Technologies AS
 2018       90        295          87   Tertiary Education Network 
 2905       74        266          68   The Internetworking Company o
24835       58         34           6   RAYA Telecom - Egypt
 8452       55         20           5   TEDATA
12455       41          7           4   Jambonet Autonomous system
 9129       39          3           2   UUNET Kenya
 6713       35         54           9   Itissalat Al-MAGHRIB
 5713       27        141          24   Telkom SA Ltd 
 8524       24          1           4   AUCEGYPT Autonomous System
16637       22         10          19   Johnnic e-Ventures 
10798       19          1          11   Standard Bank of South Africa
 7460       18          3           5   LIA Internet Access 
 8346       18         10          11   SONATEL-AS Autonomous System
12258       18          3          12   Vodacom Internet Company 
21280       18          2           3   Swift Global Kenya Ltd.Is an 
15808       16          1           1   Communication Solutions Ltd i
21491       16          1           3   UTL On-line is RF broadband I

Global Per AS Maximum Aggr summary
----------------------------------

  ASN   No of nets  Net Savings Description
    0         0       65531      *
 4323      1085         861      Time Warner Telecom
  721      1119         805      DLA Systems Automation Center
18566       780         774      Covad Communications 
 4134       894         716      CHINANET-BACKBONE
 9583       631         599      Sify Limited
 6197       880         468      BellSouth Network Solutions, 
22773       475         454      Cox Communications, Inc.
 5668       473         447      CenturyTel Internet Holdings,
27364       465         447      Armstrong Cable Services 
 7545       485         415      TPG Internet Pty Ltd
 3602       506         413      Sprint Canada, Inc. 
 4755       501         396      Videsh Sanchar Nigam Ltd. Aut
 6467       420         387      E.Spire Communications, Inc. 
 6478       498         383      AT&T Worldnet Services 
17676       425         351      Softbank BB Corp.
 6140       384         313      ImpSat
 9929       358         313      China Netcom Corp.
 4766       584         309      Korea Telecom (KIX)
 9443       374         295      Primus Telecommunications

List of Unregistered ASNs (Global)
----------------------------------

Bad AS  Designation  Network              Transit AS  Description
65535   PRIVATE       64.111.161.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.162.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.164.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.165.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.167.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.169.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.170.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.171.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.172.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.173.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.174.0/24      33205       KMC Telecom Solution
65535   PRIVATE       64.111.175.0/24      33205       KMC Telecom Solution
64826   PRIVATE       64.200.250.0/23       7911       Williams Communicati
30998   UNALLOCATED   65.120.56.0/21         209       Qwest 
64500   RESERVED      85.114.96.0/21        1680       NetVision Ltd.
65503   PRIVATE       193.125.183.0/24      3217       SIMBIRSK
30998   UNALLOCATED   196.207.0.0/20         209       Qwest 
65004   PRIVATE       200.0.113.0/24       28477       Universidad Autonoma
65004   PRIVATE       200.4.0.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.1.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.2.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.3.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.4.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.5.0/24         28477       Universidad Autonoma
65004   PRIVATE       200.4.6.0/24         28477       Universidad Autonoma
24255   UNALLOCATED   202.88.192.0/21       4721       Musasino-Mitaka Cabl
24255   UNALLOCATED   202.127.80.0/20       4721       Musasino-Mitaka Cabl
65529   PRIVATE       216.21.199.0/24      14697       VDot.Net 
65529   PRIVATE       216.152.237.0/24     14697       VDot.Net 

Advertised Unallocated Addresses
--------------------------------

Network            Origin AS  Description
132.0.0.0/10           721     DLA Systems Automation Center
137.0.0.0/13           721     DLA Systems Automation Center
158.0.0.0/13           721     DLA Systems Automation Center
172.32.0.0/24         7011     Citizens Utilities 
192.43.230.0/24       7575     Australian Academic and Rease
192.44.0.0/24         5501     Fraunhofer Gesellschaft
192.44.0.0/19          702     UUNET - Commercial IP service
192.70.164.0/24      25689     National Research Council of 
192.84.205.0/24        719     LANLINK autonomous system
192.119.135.0/24       270     NASA 
192.135.50.0/24       7018     AT&T WorldNet Services
192.172.0.0/19         721     DLA Systems Automation Center
192.200.100.0/24      7018     AT&T WorldNet Services

Number of prefixes announced per prefix length (Global)
-------------------------------------------------------

 /1:0        /2:0        /3:0        /4:0        /5:0        /6:0       
 /7:0        /8:19       /9:3       /10:8       /11:14      /12:64      
/13:151     /14:305     /15:575     /16:8331    /17:2489    /18:4266    
/19:10126   /20:10857   /21:8722    /22:12126   /23:13204   /24:86402   
/25:265     /26:259     /27:128     /28:60      /29:26      /30:90      
/31:0       /32:43      

Advertised prefixes smaller than registry allocations
-----------------------------------------------------

  ASN   No of nets  Total ann.   Description
18566      765           780      Covad Communications 
 6197      721           880      BellSouth Network Solutions, 
 7018      651          1477      AT&T WorldNet Services
 2386      581           829      AT&T Data Communications Serv
 4323      506          1085      Time Warner Telecom
 9583      453           631      Sify Limited
27364      450           465      Armstrong Cable Services 
 4766      400           584      Korea Telecom (KIX)
 5668      399           473      CenturyTel Internet Holdings,
 1239      379           915      Sprint 
  702      366           603      UUNET - Commercial IP service
 6198      337           470      BellSouth Network Solutions, 
 6467      312           420      E.Spire Communications, Inc. 
10036      306           306      C&M Communication Co. Ltd.
 6517      288           310      Yipes Communications, Inc. 
 9929      282           358      China Netcom Corp.
 7011      280           329      Citizens Utilities 
11456      263           310      Carolina Online, Inc. 
15270      249           268      PaeTec.net -a division of Pae
13609      247           292      Choice One Communications Inc

Number of /24s announced per /8 block (Global)
----------------------------------------------

   4:4         8:11       12:1502     13:1        15:9        16:2      
  17:3        18:4        20:4        24:744      32:64       33:4      
  38:102      40:55       44:3        47:2        52:3        55:2      
  56:3        57:23       58:5        59:11       60:25       61:739    
  62:540      63:1874     64:2638     65:2082     66:2727     67:511    
  68:506      69:952      70:77       71:5        72:121      80:536    
  81:510      82:350      83:248      84:129      85:175     128:139    
 129:156     130:89      131:281     132:33      133:1       134:144    
 135:40      136:184     137:65      138:158     139:50      140:193    
 141:105     142:139     143:130     144:172     145:45      146:281    
 147:101     148:293     149:167     150:97      151:63      152:108    
 153:85      154:3       155:143     156:64      157:87      158:167    
 159:168     160:72      161:60      162:199     163:84      164:213    
 165:160     166:127     167:228     168:412     169:135     170:306    
 171:8       172:1       192:5660    193:3109    194:2321    195:1614   
 196:626     198:3921    199:3264    200:4062    201:59      202:5356   
 203:6116    204:3743    205:2027    206:2365    207:2708    208:2072   
 209:3233    210:1639    211:829     212:1180    213:1275    214:240    
 215:31      216:3692    217:1140    218:190     219:101     220:372    
 221:123     222:72     

End of report