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From: Routing Analysis Role Account (no email)
Date: Fri Mar 07 2008 - 13:07:00 EST
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
For historical data, please see http://thyme.apnic.net.
If you have any comments please contact Philip Smith <>.
Routing Table Report 04:00 +10GMT Sat 08 Mar, 2008
Report Website: http://thyme.apnic.net
Detailed Analysis: http://thyme.apnic.net/current/
Analysis Summary
----------------
BGP routing table entries examined: 248227
Prefixes after maximum aggregation: 125224
Deaggregation factor: 1.98
Unique aggregates announced to Internet: 120307
Total ASes present in the Internet Routing Table: 27574
Prefixes per ASN: 9.00
Origin-only ASes present in the Internet Routing Table: 24019
Origin ASes announcing only one prefix: 11654
Transit ASes present in the Internet Routing Table: 3555
Transit-only ASes present in the Internet Routing Table: 78
Average AS path length visible in the Internet Routing Table: 3.6
Max AS path length visible: 19
Max AS path prepend of ASN (43380) 13
Prefixes from unregistered ASNs in the Routing Table: 38
Unregistered ASNs in the Routing Table: 16
Number of 32-bit ASNs allocated by the RIRs: 45
Prefixes from 32-bit ASNs in the Routing Table: 8
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 865
Number of addresses announced to Internet: 1857283104
Equivalent to 110 /8s, 179 /16s and 228 /24s
Percentage of available address space announced: 50.1
Percentage of allocated address space announced: 61.5
Percentage of available address space allocated: 81.4
Percentage of address space in use by end-sites: 70.7
Total number of prefixes smaller than registry allocations: 117841
APNIC Region Analysis Summary
-----------------------------
Prefixes being announced by APNIC Region ASes: 56724
Total APNIC prefixes after maximum aggregation: 20940
APNIC Deaggregation factor: 2.71
Prefixes being announced from the APNIC address blocks: 54145
Unique aggregates announced from the APNIC address blocks: 23140
APNIC Region origin ASes present in the Internet Routing Table: 3158
APNIC Prefixes per ASN: 17.15
APNIC Region origin ASes announcing only one prefix: 838
APNIC Region transit ASes present in the Internet Routing Table: 489
Average APNIC Region AS path length visible: 3.6
Max APNIC Region AS path length visible: 15
Number of APNIC addresses announced to Internet: 334801056
Equivalent to 19 /8s, 244 /16s and 168 /24s
Percentage of available APNIC address space announced: 76.8
APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079
APNIC Address Blocks 58/8, 59/8, 60/8, 61/8, 114/8, 115/8, 116/8,
117/8, 118/8, 119/8, 120/8, 121/8, 122/8, 123/8,
124/8, 125/8, 126/8, 202/8, 203/8, 210/8, 211/8,
218/8, 219/8, 220/8, 221/8, 222/8,
ARIN Region Analysis Summary
----------------------------
Prefixes being announced by ARIN Region ASes: 116118
Total ARIN prefixes after maximum aggregation: 65373
ARIN Deaggregation factor: 1.78
Prefixes being announced from the ARIN address blocks: 84829
Unique aggregates announced from the ARIN address blocks: 33461
ARIN Region origin ASes present in the Internet Routing Table: 12188
ARIN Prefixes per ASN: 6.96
ARIN Region origin ASes announcing only one prefix: 4686
ARIN Region transit ASes present in the Internet Routing Table: 1152
Average ARIN Region AS path length visible: 3.4
Max ARIN Region AS path length visible: 15
Number of ARIN addresses announced to Internet: 356743808
Equivalent to 21 /8s, 67 /16s and 122 /24s
Percentage of available ARIN address space announced: 73.3
ARIN AS Blocks 1-1876, 1902-2042, 2044-2046, 2048-2106
(pre-ERX allocations) 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
35840-36863, 39936-40959
ARIN Address Blocks 24/8, 63/8, 64/8, 65/8, 66/8, 67/8, 68/8,
69/8, 70/8, 71/8, 72/8, 73/8, 74/8, 75/8,
76/8, 96/8, 97/8, 98/8, 99/8, 173/8, 174/8,
199/8, 204/8, 205/8, 206/8, 207/8, 208/8, 209/8,
216/8,
RIPE Region Analysis Summary
----------------------------
Prefixes being announced by RIPE Region ASes: 52904
Total RIPE prefixes after maximum aggregation: 33036
RIPE Deaggregation factor: 1.60
Prefixes being announced from the RIPE address blocks: 48005
Unique aggregates announced from the RIPE address blocks: 32257
RIPE Region origin ASes present in the Internet Routing Table: 11009
RIPE Prefixes per ASN: 4.36
RIPE Region origin ASes announcing only one prefix: 5750
RIPE Region transit ASes present in the Internet Routing Table: 1683
Average RIPE Region AS path length visible: 4.0
Max RIPE Region AS path length visible: 18
Number of RIPE addresses announced to Internet: 346944256
Equivalent to 20 /8s, 173 /16s and 243 /24s
Percentage of available RIPE address space announced: 79.5
RIPE AS Blocks 1877-1901, 2043, 2047, 2107-2136, 2585-2614
(pre-ERX allocations) 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, 38912-39935
40960-45055
RIPE Address Blocks 62/8, 77/8, 78/8, 79/8, 80/8, 81/8, 82/8,
83/8, 84/8, 85/8, 86/8, 87/8, 88/8, 89/8,
90/8, 91/8, 92/8, 93/8, 94/8, 95/8, 193/8,
194/8, 195/8, 212/8, 213/8, 217/8,
LACNIC Region Analysis Summary
------------------------------
Prefixes being announced by LACNIC Region ASes: 18849
Total LACNIC prefixes after maximum aggregation: 4739
LACNIC Deaggregation factor: 3.98
Prefixes being announced from the LACNIC address blocks: 17203
Unique aggregates announced from the LACNIC address blocks: 9412
LACNIC Region origin ASes present in the Internet Routing Table: 907
LACNIC Prefixes per ASN: 18.97
LACNIC Region origin ASes announcing only one prefix: 301
LACNIC Region transit ASes present in the Internet Routing Table: 156
Average LACNIC Region AS path length visible: 3.9
Max LACNIC Region AS path length visible: 19
Number of LACNIC addresses announced to Internet: 48970496
Equivalent to 2 /8s, 235 /16s and 59 /24s
Percentage of available LACNIC address space announced: 48.6
LACNIC AS Blocks 26592-26623, 27648-28671, plus ERX transfers
LACNIC Address Blocks 186/8, 187/8, 189/8, 190/8, 200/8, 201/8,
AfriNIC Region Analysis Summary
-------------------------------
Prefixes being announced by AfriNIC Region ASes: 3591
Total AfriNIC prefixes after maximum aggregation: 1120
AfriNIC Deaggregation factor: 3.21
Prefixes being announced from the AfriNIC address blocks: 4027
Unique aggregates announced from the AfriNIC address blocks: 1801
AfriNIC Region origin ASes present in the Internet Routing Table: 233
AfriNIC Prefixes per ASN: 17.28
AfriNIC Region origin ASes announcing only one prefix: 79
AfriNIC Region transit ASes present in the Internet Routing Table: 43
Average AfriNIC Region AS path length visible: 3.8
Max AfriNIC Region AS path length visible: 14
Number of AfriNIC addresses announced to Internet: 10017280
Equivalent to 0 /8s, 152 /16s and 218 /24s
Percentage of available AfriNIC address space announced: 29.9
AfriNIC AS Blocks 36864-37887 & ERX transfers
AfriNIC Address Blocks 41/8, 196/8,
APNIC Region per AS prefix count summary
----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
4755 1539 381 125 Videsh Sanchar Nigam Ltd. Aut
9498 1155 550 66 BHARTI BT INTERNET LTD.
9583 1149 109 25 Sify Limited
17488 1007 65 90 Hathway IP Over Cable Interne
4134 853 12379 314 CHINANET-BACKBONE
4766 847 6005 340 Korea Telecom (KIX)
23577 813 34 697 Korea Telecom (ATM-MPLS)
18101 681 127 60 Reliance Infocom Ltd Internet
9829 595 449 11 BSNL National Internet Backbo
4812 560 951 90 China Telecom (Shanghai)
Complete listing at http://thyme.apnic.net/current/data-ASnet-APNIC
ARIN Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
7018 1425 5928 999 AT&T WorldNet Services
4323 1385 1012 366 Time Warner Telecom
2386 1377 638 839 AT&T Data Communications Serv
11492 1218 144 26 Cable One
7011 1063 309 609 Citizens Utilities
18566 1043 296 10 Covad Communications
6197 996 729 476 BellSouth Network Solutions,
1785 975 479 107 AppliedTheory Corporation
174 968 6835 817 Cogent Communications
6478 930 237 109 AT&T Worldnet Services
Complete listing at http://thyme.apnic.net/current/data-ASnet-ARIN
RIPE Region per AS prefix count summary
---------------------------------------
ASN No of nets /20 equiv MaxAgg Description
3292 398 1778 363 TDC Tele Danmark
8452 392 188 7 TEDATA
3301 338 1443 307 TeliaNet Sweden
3320 323 7045 268 Deutsche Telekom AG
8866 292 78 24 Bulgarian Telecommunication C
8551 279 267 42 Bezeq International
680 276 2046 256 DFN-IP service G-WiN
5462 275 666 26 Telewest Broadband
8708 275 421 245 Romania Data Systems S.A.
3215 271 2607 94 France Telecom Transpac
Complete listing at http://thyme.apnic.net/current/data-ASnet-RIPE
LACNIC Region per AS prefix count summary
-----------------------------------------
ASN No of nets /20 equiv MaxAgg Description
8151 1191 2449 221 UniNet S.A. de C.V.
11830 556 299 9 Instituto Costarricense de El
7303 449 218 59 Telecom Argentina Stet-France
16814 426 27 10 NSS, S.A.
6471 398 85 40 ENTEL CHILE S.A.
11172 398 115 66 Servicios Alestra S.A de C.V
10620 369 97 51 TVCABLE BOGOTA
14117 352 25 15 Telefonica del Sur S.A.
10481 325 124 10 Prima S.A.
22047 323 270 14 VTR PUNTO NET S.A.
Complete listing at http://thyme.apnic.net/current/data-ASnet-LACNIC
AfriNIC Region per AS prefix count summary
------------------------------------------
ASN No of nets /20 equiv MaxAgg Description
24863 448 60 27 LINKdotNET AS number
3741 288 869 224 The Internet Solution
2018 252 276 111 Tertiary Education Network
20858 217 34 4 EgyNet
6713 143 135 11 Itissalat Al-MAGHRIB
33783 130 9 16 EEPAD TISP TELECOM & INTERNET
5536 121 8 16 Internet Egypt Network
33776 99 6 7 Starcomms Nigeria Limited
24835 90 48 7 RAYA Telecom - Egypt
29571 80 13 7 Ci Telecom Autonomous system
Complete listing at http://thyme.apnic.net/current/data-ASnet-AFRINIC
Global Per AS prefix count summary
----------------------------------
ASN No of nets /20 equiv MaxAgg Description
4755 1539 381 125 Videsh Sanchar Nigam Ltd. Aut
7018 1425 5928 999 AT&T WorldNet Services
4323 1385 1012 366 Time Warner Telecom
2386 1377 638 839 AT&T Data Communications Serv
11492 1218 144 26 Cable One
8151 1191 2449 221 UniNet S.A. de C.V.
9498 1155 550 66 BHARTI BT INTERNET LTD.
9583 1149 109 25 Sify Limited
7011 1063 309 609 Citizens Utilities
18566 1043 296 10 Covad Communications
Complete listing at http://thyme.apnic.net/current/data-ASnet
Global Per AS Maximum Aggr summary
----------------------------------
ASN No of nets Net Savings Description
11492 1218 1192 Cable One
9583 1149 1124 Sify Limited
9498 1155 1089 BHARTI BT INTERNET LTD.
18566 1043 1033 Covad Communications
4323 1385 1019 Time Warner Telecom
8151 1191 970 UniNet S.A. de C.V.
17488 1007 917 Hathway IP Over Cable Interne
1785 975 868 AppliedTheory Corporation
6478 930 821 AT&T Worldnet Services
22773 886 821 Cox Communications, Inc.
Complete listing at http://thyme.apnic.net/current/data-CIDRnet
List of Unregistered Origin ASNs (Global)
-----------------------------------------
Bad AS Designation Network Transit AS Description
18506 UNALLOCATED 63.107.123.0/24 33286 Turlock Irrigation D
16886 UNALLOCATED 63.109.3.0/24 1239 Sprint
16886 UNALLOCATED 63.167.139.0/24 1239 Sprint
33526 UNALLOCATED 64.128.26.0/24 4323 Time Warner Telecom
65000 PRIVATE 92.62.240.0/20 24750 Cable Internet Syste
64601 PRIVATE 118.232.77.0/24 9924 Taiwan Fixed Network
64601 PRIVATE 118.232.78.0/24 9924 Taiwan Fixed Network
64601 PRIVATE 118.232.224.0/21 9924 Taiwan Fixed Network
64601 PRIVATE 118.232.224.0/20 9924 Taiwan Fixed Network
64601 PRIVATE 118.232.232.0/21 9924 Taiwan Fixed Network
Complete listing at http://thyme.apnic.net/current/data-badAS
Advertised Unallocated Addresses
--------------------------------
Network Origin AS Description
24.48.10.0/23 19548 Adelphia Business Solutions
24.48.12.0/22 19548 Adelphia Business Solutions
24.48.80.0/21 19548 Adelphia Business Solutions
24.54.224.0/19 20001 HoldCo LLC - Road Runner
24.75.192.0/18 19548 Adelphia Business Solutions
24.142.40.0/21 7018 AT&T WorldNet Services
24.142.160.0/19 7018 AT&T WorldNet Services
24.246.0.0/17 7018 AT&T WorldNet Services
24.246.128.0/18 7018 AT&T WorldNet Services
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
Complete listing at http://thyme.apnic.net/current/data-add-IANA
Number of prefixes announced per prefix length (Global)
-------------------------------------------------------
/1:0 /2:0 /3:0 /4:0 /5:0 /6:0
/7:0 /8:20 /9:9 /10:16 /11:40 /12:139
/13:278 /14:496 /15:989 /16:9764 /17:4239 /18:7165
/19:15172 /20:17402 /21:16580 /22:20967 /23:22098 /24:130127
/25:899 /26:1121 /27:578 /28:110 /29:9 /30:1
/31:0 /32:8
Advertised prefixes smaller than registry allocations
-----------------------------------------------------
ASN No of nets Total ann. Description
11492 1205 1218 Cable One
2386 1084 1377 AT&T Data Communications Serv
18566 1024 1043 Covad Communications
9583 986 1149 Sify Limited
7011 946 1063 Citizens Utilities
6478 929 930 AT&T Worldnet Services
4755 915 1539 Videsh Sanchar Nigam Ltd. Aut
17488 822 1007 Hathway IP Over Cable Interne
9498 817 1155 BHARTI BT INTERNET LTD.
23577 804 813 Korea Telecom (ATM-MPLS)
Complete listing at http://thyme.apnic.net/current/data/sXXas-nos
Number of /24s announced per /8 block (Global)
----------------------------------------------
4:9 8:100 11:1 12:1992 13:2 15:21
16:3 17:6 18:13 20:35 24:1044 25:1
32:61 33:4 38:399 40:65 41:617 44:2
47:8 52:3 55:3 56:3 57:22 58:512
59:420 60:416 61:981 62:1122 63:1963 64:3338
65:2363 66:3614 67:1023 68:637 69:2096 70:506
71:124 72:1487 73:6 74:868 75:234 76:265
77:583 78:510 79:92 80:879 81:814 82:604
83:356 84:541 85:1011 86:391 87:635 88:290
89:1179 90:11 91:1079 92:157 93:135 96:16
97:14 98:88 99:3 116:551 117:270 118:81
119:165 121:443 122:713 123:306 124:816 125:1117
128:322 129:200 130:132 131:399 132:67 133:9
134:188 135:32 136:223 137:118 138:154 139:64
140:485 141:108 142:379 143:270 144:343 145:53
146:334 147:131 148:496 149:177 150:117 151:155
152:144 153:131 154:11 155:266 156:207 157:252
158:164 159:218 160:246 161:101 162:201 163:192
164:565 165:429 166:295 167:311 168:590 169:130
170:426 171:29 172:3 189:156 190:1369 192:5757
193:4109 194:3259 195:2360 196:1083 198:3780 199:3201
200:5468 201:1307 202:7595 203:7729 204:3980 205:2089
206:2420 207:2752 208:3213 209:3506 210:2529 211:1030
212:1314 213:1610 214:438 215:48 216:4180 217:1225
218:339 219:390 220:1075 221:400 222:310
End of report
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