Weekly Routing Table Report
Routing Analysis
cscora at dev.apnic.net
Thu Apr 26 14:11:00 EDT 2001
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 at lists.apnic.net
For a graphical representation, please see http://www.apnic.net/stats/bgp.
If you have any comments please contact Philip Smith <pfs at cisco.com>.
Routing Table Report 27 Apr, 2001
Analysis Summary
----------------
BGP routing table entries examined: 104638
Origin ASes present in the Internet Routing Table: 10673
Origin ASes announcing only one prefix: 3885
Transit ASes present in the Internet Routing Table: 1436
Average AS path length visible in the Internet Routing Table: 5.3
Max AS path length visible: 21
Illegal AS announcements present in the Routing Table: 19
Non-routable prefixes present in the Routing Table: 0
Prefixes being announced from the IANA Reserved Address blocks: 1
Number of addresses announced to Internet: 1223206251
Equivalent to 72 /8s, 232 /16s and 165 /24s
Percentage of available address space announced: 33.0
Percentage of allocated address space announced: 63.6
Percentage of available address space allocated: 51.9
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 15702
Prefixes being announced from the APNIC address blocks: 14207
APNIC Region origin ASes present in the Internet Routing Table: 1233
APNIC Region origin ASes announcing only one prefix: 441
APNIC Region transit ASes present in the Internet Routing Table: 199
Average APNIC Region AS path length visible: 5.1
Max APNIC Region AS path length visible: 21
Number of APNIC addresses announced to Internet: 71044162
Equivalent to 4 /8s, 60 /16s and 12 /24s
Percentage of available APNIC address space announced: 69.8
APNIC AS Blocks 4608 - 4864, 7467 - 7722, 9216 - 10239, 17408 - 18431
APNIC Address Blocks 61/8, 202/7, 210/7 and 218/8
ARIN Region Analysis Summary
----------------------------
Prefixes being announced by ARIN Region ASes: 72658
Prefixes being announced from the ARIN address blocks: 49910
ARIN Region origin ASes present in the Internet Routing Table: 6488
ARIN Region origin ASes announcing only one prefix: 1937
ARIN Region transit ASes present in the Internet Routing Table: 688
Average ARIN Region AS path length visible: 5.2
Max ARIN Region AS path length visible: 14
Number of ARIN addresses announced to Internet: 181209106
Equivalent to 10 /8s, 205 /16s and 8 /24s
Percentage of available ARIN address space announced: 83.1
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
ARIN Address Blocks 63/8, 64/7, 66/8, 199/8, 200/8, 204/6, 208/7 and 216/8
RIPE Region Analysis Summary
----------------------------
Prefixes being announced by RIPE Region ASes: 16259
Prefixes being announced from the RIPE address blocks: 12958
RIPE Region origin ASes present in the Internet Routing Table: 2951
RIPE Region origin ASes announcing only one prefix: 1505
RIPE Region transit ASes present in the Internet Routing Table: 549
Average RIPE Region AS path length visible: 5.9
Max RIPE Region AS path length visible: 15
Number of RIPE addresses announced to Internet: 96959193
Equivalent to 5 /8s, 199 /16s and 122 /24s
Percentage of available RIPE address space announced: 64.2
RIPE AS Blocks 1877 - 1901, 2042, 2047, 2107 - 2136, 2585 - 2614
2773 - 2822, 2830 - 2879, 3154 - 3353, 5377 - 5631
6656 - 6911, 8192 - 9215, 12288 - 13311, 15360 - 16383
20480 - 21503
RIPE Address Blocks 62/8, 80/7, 193/8, 194/7, 212/7 and 217/8
APNIC Region per AS prefix count summary
----------------------------------------
ASN No of nets /19 equiv Description
1221 2010 692 Telstra
2764 428 139 connect.com.au pty ltd
703 390 205 UUNET Technologies, Inc.
2907 363 875 SINET Japan
4755 317 111 VSNL India
7539 219 101 Delegated to TWNIC for subseq
4134 194 631 Data Communications Bureau
4766 186 766 KORnet Powered BY Korea Telec
7474 184 85 Optus Communications
4538 183 989 China Education and Research
7657 173 13 The Internet Group Limited
9269 161 22 Hong Kong CTI
1237 156 70 System Engineering Research I
4740 153 10 Ozemail
17561 151 61 Internet service provision to
7545 146 10 TPG Internet Pty Ltd
4786 128 7 NetConnect Communications Pty
7586 125 10 Paradox Digital Pty. Ltd
7617 124 46 One.Net Pty Ltd
9443 122 22 INTERNETPRIMUS-AS-A
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /19 equiv Description
702 538 649 UUNET Technologies, Inc.
3301 389 337 TeliaNet Sweden
1257 278 263 Swipnet AB
1270 276 448 UUNET Germany
680 211 938 Deutschef Forschurgsnetz
3215 211 228 RAIN
5515 191 336 Sonera Finland
719 189 146 LANLINK
786 180 935 JANET IP Service
3320 161 710 Deutsche Telekom AG
5400 128 40 Concert Internet Plus Europea
517 127 134 Xlink
3303 124 298 Swisscom
2856 122 388 BTnet UK Regional network
8708 118 5 Romania Data System
1290 116 206 PSINet UK Ltd.
1849 105 223 UUNET UK (formerly PIPEX)
1267 101 978 IUnet S.p.A
1901 97 77 EUnet Austria
3269 85 277 TELECOM ITALIA
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /19 equiv Description
701 2367 3732 UUNET Technologies, Inc.
705 1752 73 UUNET Technologies, Inc.
7018 963 3159 AT&T
1 962 4472 BBN Planet
7046 773 553 UUNET Technologies, Inc.
1239 631 1581 Sprint ICM-Inria
2914 604 1202 Verio, Inc.
3561 562 1249 Cable & Wireless USA
18994 525 6 Crossing
3549 499 515 Global Crossing
174 475 2755 PSINet Inc.
4293 475 51 Cable & Wireless USA
209 450 715 Qwest
690 445 44 Merit Network
2548 402 514 Digital Express Group, Inc.
3908 375 262 Supernet, Inc.
8151 365 226 UniNet S.A. de C.V.
3602 345 72 Sprint Canada
3967 337 226 Exodus Communication
4323 337 136 Time Warner Communications, I
Global Per AS prefix count summary
----------------------------------
ASN No of nets /19 equiv Description
701 2367 3732 UUNET Technologies, Inc.
1221 2010 692 Telstra
705 1752 73 UUNET Technologies, Inc.
7018 963 3159 AT&T
1 962 4472 BBN Planet
7046 773 553 UUNET Technologies, Inc.
1239 631 1581 Sprint ICM-Inria
2914 604 1202 Verio, Inc.
3561 562 1249 Cable & Wireless USA
702 538 649 UUNET Technologies, Inc.
18994 525 6 Crossing
3549 499 515 Global Crossing
174 475 2755 PSINet Inc.
4293 475 51 Cable & Wireless USA
209 450 715 Qwest
690 445 44 Merit Network
2764 428 139 connect.com.au pty ltd
2548 402 514 Digital Express Group, Inc.
703 390 205 UUNET Technologies, Inc.
3301 389 337 TeliaNet Sweden
List of Unregistered ASNs (Global)
----------------------------------
Bad AS Designation Network Transit AS Description
60002 RESERVED 64.76.148.0/24 19583 CHILE S.A.
2027 UNALLOCATED 150.185.128.0/18 8143 Publicom Corp.
64842 PRIVATE 164.159.151.0/24 19143 Fish and Wildlife Se
64842 PRIVATE 164.159.152.0/22 19143 Fish and Wildlife Se
64842 PRIVATE 164.159.159.0/24 19143 Fish and Wildlife Se
64842 PRIVATE 164.159.160.0/24 19143 Fish and Wildlife Se
1877 UNALLOCATED 192.108.196.0/24 1800 SPRINT
1877 UNALLOCATED 192.108.209.0/24 1880 Stupi, house man's
1877 UNALLOCATED 192.108.210.0/24 1880 Stupi, house man's
1877 UNALLOCATED 192.108.214.0/24 1800 SPRINT
5757 UNALLOCATED 192.239.13.0/24 701 UUNET Technologies,
60002 RESERVED 200.9.98.0/24 6429 RdC Internet
60002 RESERVED 200.9.99.0/24 6429 RdC Internet
65535 PRIVATE 203.24.169.0/24 17486 Swiftel Communicatio
65500 PRIVATE 203.166.86.0/24 10084 Western Australian I
5555 UNALLOCATED 205.110.64.0/24 721 DLA Systems Automati
5555 UNALLOCATED 205.110.68.0/22 721 DLA Systems Automati
5555 UNALLOCATED 205.110.72.0/21 721 DLA Systems Automati
5757 UNALLOCATED 207.19.224.0/24 701 UUNET Technologies,
Advertised IANA Reserved Addresses
----------------------------------
Network Origin AS Description
201.115.100.0/24 7018 AT&T
Number of prefixes announced per prefix length (Global)
-------------------------------------------------------
/1:0 /2:0 /3:0 /4:0 /5:0 /6:0
/7:0 /8:21 /9:4 /10:4 /11:10 /12:29
/13:67 /14:204 /15:331 /16:6936 /17:1138 /18:2101
/19:6595 /20:5104 /21:4438 /22:6747 /23:8662 /24:60408
/25:288 /26:463 /27:294 /28:296 /29:227 /30:193
/31:1 /32:77
Number of /24s announced per /8 block (Global)
----------------------------------------------
9:3 12:353 13:10 15:1 17:2 24:682
26:1 32:23 38:7 44:3 47:1 53:2
55:1 57:11 61:28 62:133 63:1939 64:1473
65:1069 66:310 128:35 129:114 130:22 131:26
132:9 133:1 134:166 135:9 136:16 137:119
138:250 139:62 140:143 141:163 142:60 143:41
144:132 145:9 146:133 147:134 148:142 149:123
150:28 151:301 152:792 153:33 154:17 155:81
156:40 157:108 158:173 159:84 160:28 161:58
162:61 163:135 164:87 165:124 166:176 167:133
168:85 169:33 170:256 171:2 192:5381 193:1974
194:2079 195:810 196:407 198:3667 199:3403 200:1974
201:1 202:2484 203:5033 204:3379 205:2243 206:2705
207:2914 208:2930 209:3178 210:504 211:150 212:838
213:382 214:9 215:11 216:2944 217:212
End of report
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