The Border Gateway Protocol (BGP) is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems (AS). It is described as a path vector protocol. BGP does not use traditional Interior Gateway Protocol (IGP) metrics, but makes routing decisions based on path, network policies and/or rulesets. For this reason, it is more appropriately termed a reachability protocol rather than routing protocol.

Thursday, May 3, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 04 May, 2012

Report Website: http://thyme.rand.apnic.net
Detailed Analysis: http://thyme.rand.apnic.net/current/

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

BGP routing table entries examined: 407854
Prefixes after maximum aggregation: 173143
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 198376
Total ASes present in the Internet Routing Table: 40876
Prefixes per ASN: 9.98
Origin-only ASes present in the Internet Routing Table: 33121
Origin ASes announcing only one prefix: 15620
Transit ASes present in the Internet Routing Table: 5471
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 64
Max AS path prepend of ASN ( 9902) 56
Prefixes from unregistered ASNs in the Routing Table: 401
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 2658
Number of 32-bit ASNs visible in the Routing Table: 2284
Prefixes from 32-bit ASNs in the Routing Table: 5732
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 116
Number of addresses announced to Internet: 2542473872
Equivalent to 151 /8s, 139 /16s and 18 /24s
Percentage of available address space announced: 68.6
Percentage of allocated address space announced: 68.7
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.5
Total number of prefixes smaller than registry allocations: 173910

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

Prefixes being announced by APNIC Region ASes: 99635
Total APNIC prefixes after maximum aggregation: 32280
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96106
Unique aggregates announced from the APNIC address blocks: 39829
APNIC Region origin ASes present in the Internet Routing Table: 4687
APNIC Prefixes per ASN: 20.50
APNIC Region origin ASes announcing only one prefix: 1237
APNIC Region transit ASes present in the Internet Routing Table: 729
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 193
Number of APNIC addresses announced to Internet: 644323168
Equivalent to 38 /8s, 103 /16s and 151 /24s
Percentage of available APNIC address space announced: 81.7

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 132096-133119
APNIC Address Blocks 1/8, 14/8, 27/8, 36/8, 39/8, 42/8, 43/8,
49/8, 58/8, 59/8, 60/8, 61/8, 101/8, 103/8,
106/8, 110/8, 111/8, 112/8, 113/8, 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, 133/8, 175/8, 180/8,
182/8, 183/8, 202/8, 203/8, 210/8, 211/8, 218/8,
219/8, 220/8, 221/8, 222/8, 223/8,

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

Prefixes being announced by ARIN Region ASes: 150423
Total ARIN prefixes after maximum aggregation: 76435
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121420
Unique aggregates announced from the ARIN address blocks: 50618
ARIN Region origin ASes present in the Internet Routing Table: 15066
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5735
ARIN Region transit ASes present in the Internet Routing Table: 1590
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 809044416
Equivalent to 48 /8s, 57 /16s and 9 /24s
Percentage of available ARIN address space announced: 64.5

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, 46080-47103
53248-55295, 393216-394239
ARIN Address Blocks 3/8, 4/8, 6/8, 7/8, 8/8, 9/8, 11/8,
12/8, 13/8, 15/8, 16/8, 17/8, 18/8, 19/8,
20/8, 21/8, 22/8, 23/8, 24/8, 26/8, 28/8,
29/8, 30/8, 32/8, 33/8, 34/8, 35/8, 38/8,
40/8, 44/8, 45/8, 47/8, 48/8, 50/8, 52/8,
53/8, 54/8, 55/8, 56/8, 57/8, 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, 100/8, 104/8, 107/8, 108/8, 173/8,
174/8, 184/8, 199/8, 204/8, 205/8, 206/8, 207/8,
208/8, 209/8, 214/8, 215/8, 216/8,

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

Prefixes being announced by RIPE Region ASes: 101909
Total RIPE prefixes after maximum aggregation: 53962
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93811
Unique aggregates announced from the RIPE address blocks: 58439
RIPE Region origin ASes present in the Internet Routing Table: 16534
RIPE Prefixes per ASN: 5.67
RIPE Region origin ASes announcing only one prefix: 8043
RIPE Region transit ASes present in the Internet Routing Table: 2636
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1536
Number of RIPE addresses announced to Internet: 511339592
Equivalent to 30 /8s, 122 /16s and 108 /24s
Percentage of available RIPE address space announced: 82.4

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, 47104-52223, 56320-58367
196608-198655
RIPE Address Blocks 2/8, 5/8, 25/8, 31/8, 37/8, 46/8, 51/8,
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, 109/8,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,

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

Prefixes being announced by LACNIC Region ASes: 41010
Total LACNIC prefixes after maximum aggregation: 8250
LACNIC Deaggregation factor: 4.97
Prefixes being announced from the LACNIC address blocks: 40941
Unique aggregates announced from the LACNIC address blocks: 20318
LACNIC Region origin ASes present in the Internet Routing Table: 1593
LACNIC Prefixes per ASN: 25.70
LACNIC Region origin ASes announcing only one prefix: 438
LACNIC Region transit ASes present in the Internet Routing Table: 303
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 533
Number of LACNIC addresses announced to Internet: 99851400
Equivalent to 5 /8s, 243 /16s and 156 /24s
Percentage of available LACNIC address space announced: 66.1

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 plus ERX transfers
LACNIC Address Blocks 177/8, 179/8, 181/8, 186/8, 187/8, 189/8, 190/8,
200/8, 201/8,

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

Prefixes being announced by AfriNIC Region ASes: 8969
Total AfriNIC prefixes after maximum aggregation: 2149
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6995
Unique aggregates announced from the AfriNIC address blocks: 2231
AfriNIC Region origin ASes present in the Internet Routing Table: 534
AfriNIC Prefixes per ASN: 13.10
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 124
Average AfriNIC Region AS path length visible: 4.6
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 5
Number of AfriNIC addresses announced to Internet: 31802112
Equivalent to 1 /8s, 229 /16s and 67 /24s
Percentage of available AfriNIC address space announced: 47.4

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,

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

ASN No of nets /20 equiv MaxAgg Description
4766 2478 11113 1011 Korea Telecom (KIX)
17974 1865 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1678 301 86 TPG Internet Pty Ltd
4755 1576 385 156 TATA Communications formerly
9829 1263 1069 30 BSNL National Internet Backbo
7552 1178 1062 11 Vietel Corporation
9583 1149 85 494 Sify Limited
4808 1110 2050 318 CNCGROUP IP network: China169
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 961 291 65 BHARTI Airtel Ltd.

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-APNIC

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

ASN No of nets /20 equiv MaxAgg Description
6389 3425 3807 194 bellsouth.net, inc.
7029 3369 986 159 Windstream Communications Inc
18566 2092 382 179 Covad Communications
1785 1907 680 130 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1607 1044 383 Time Warner Telecom
22773 1591 2911 115 Cox Communications, Inc.
30036 1422 261 766 Mediacom Communications Corp
7018 1246 9782 816 AT&T WorldNet Services
11492 1186 216 364 Cable One

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-ARIN

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

ASN No of nets /20 equiv MaxAgg Description
8402 1739 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
34984 688 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
6830 655 2215 426 UPC Distribution Services
12479 652 669 68 Uni2 Autonomous System
20940 642 208 502 Akamai Technologies European
8551 572 360 80 Bezeq International
3320 533 8441 398 Deutsche Telekom AG
2578 499 33 7 Demos, Moscow, Russia

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-RIPE

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

ASN No of nets /20 equiv MaxAgg Description
10620 1854 332 179 TVCABLE BOGOTA
28573 1818 1130 59 NET Servicos de Comunicao S.A
6503 1533 418 65 AVANTEL, S.A.
8151 1478 3000 341 UniNet S.A. de C.V.
7303 1364 830 185 Telecom Argentina Stet-France
26615 904 761 33 Tim Brasil S.A.
27947 685 74 98 Telconet S.A
11172 643 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 572 242 100 Empresa Nacional de Telecomun

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-LACNIC

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

ASN No of nets /20 equiv MaxAgg Description
8452 1309 958 13 TEDATA
24863 843 274 35 LINKdotNET AS number
6713 491 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 197 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 162 666 83 MTN Network Solutions
29571 157 15 16 Ci Telecom Autonomous system

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet-AFRINIC

Global Per AS prefix count summary
----------------------------------

ASN No of nets /20 equiv MaxAgg Description
6389 3425 3807 194 bellsouth.net, inc.
7029 3369 986 159 Windstream Communications Inc
4766 2478 11113 1011 Korea Telecom (KIX)
18566 2092 382 179 Covad Communications
1785 1907 680 130 PaeTec Communications, Inc.
17974 1865 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1854 332 179 TVCABLE BOGOTA
28573 1818 1130 59 NET Servicos de Comunicao S.A
8402 1739 544 16 Corbina telecom
7545 1678 301 86 TPG Internet Pty Ltd

Complete listing at http://thyme.rand.apnic.net/current/data-ASnet

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

ASN No of nets Net Savings Description
7029 3369 3210 Windstream Communications Inc
18566 2092 1913 Covad Communications
17974 1865 1792 PT TELEKOMUNIKASI INDONESIA
1785 1907 1777 PaeTec Communications, Inc.
28573 1818 1759 NET Servicos de Comunicao S.A
8402 1739 1723 Corbina telecom
10620 1854 1675 TVCABLE BOGOTA
7545 1678 1592 TPG Internet Pty Ltd
22773 1591 1476 Cox Communications, Inc.
6503 1533 1468 AVANTEL, S.A.

Complete listing at http://thyme.rand.apnic.net/current/data-CIDRnet

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

Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
32567 UNALLOCATED 12.14.170.0/24 4323 Time Warner Telecom
32567 UNALLOCATED 12.25.107.0/24 4323 Time Warner Telecom
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.103.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser

Complete listing at http://thyme.rand.apnic.net/current/data-badAS

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project

Complete listing at http://thyme.rand.apnic.net/current/data-dsua

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

Network Origin AS Description
5.11.8.0/21 30844 Econet Satellite Services Ltd
5.11.64.0/20 31214 TIS-DIALOG Autonomous system
5.11.96.0/20 8220 COLT Telecommunications
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg
14.192.24.0/22 45464 Room 201, TGU Bldg

Complete listing at http://thyme.rand.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 /8:19 /9:12 /10:28 /11:82 /12:234
/13:460 /14:831 /15:1492 /16:12244 /17:6243 /18:10559
/19:20630 /20:29087 /21:30119 /22:40614 /23:38111 /24:213402
/25:1199 /26:1436 /27:785 /28:164 /29:67 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3026 3369 Windstream Communications Inc
6389 2143 3425 bellsouth.net, inc.
18566 2041 2092 Covad Communications
8402 1717 1739 Corbina telecom
10620 1712 1854 TVCABLE BOGOTA
30036 1366 1422 Mediacom Communications Corp
6503 1290 1533 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1110 1309 TEDATA
1785 1072 1907 PaeTec Communications, Inc.

Complete listing at http://thyme.rand.apnic.net/current/data-sXXas-nos

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

1:537 2:660 4:14 6:3 8:406 12:1991
13:1 14:612 15:12 16:3 17:5 20:23
23:165 24:1762 27:1292 31:949 32:57 33:2
34:2 36:8 37:422 38:797 40:120 41:3095
42:131 44:3 46:1413 47:3 49:414 50:543
52:13 54:10 55:11 56:3 57:31 58:960
59:488 60:254 61:1207 62:987 63:2036 64:4167
65:2254 66:4474 67:2026 68:1163 69:3177 70:904
71:484 72:1830 74:2612 75:494 76:317 77:942
78:984 79:489 80:1212 81:906 82:668 83:546
84:483 85:1210 86:417 87:919 88:339 89:1666
90:291 91:4775 92:526 93:1498 94:1505 95:891
96:365 97:315 98:850 99:37 100:7 101:185
103:1041 106:101 107:191 108:280 109:1331 110:760
111:919 112:453 113:599 114:645 115:809 116:929
117:719 118:902 119:1232 120:354 121:691 122:1673
123:1103 124:1384 125:1249 128:560 129:194 130:251
131:619 132:178 133:22 134:245 135:62 136:215
137:176 138:356 139:165 140:494 141:244 142:409
143:434 144:522 145:70 146:500 147:283 148:773
149:307 150:157 151:180 152:464 153:172 154:12
155:399 156:217 157:375 158:175 159:541 160:338
161:260 162:348 163:191 164:584 165:398 166:573
167:467 168:821 169:128 170:858 171:127 172:2
173:1763 174:564 175:435 176:651 177:703 178:1348
180:1212 181:82 182:956 183:291 184:481 185:1
186:2257 187:1061 188:1227 189:1781 190:5486 192:6015
193:5551 194:4665 195:3597 196:1272 197:134 198:3655
199:4576 200:5828 201:1937 202:8550 203:8604 204:4341
205:2503 206:2751 207:2795 208:4053 209:3621 210:2730
211:1475 212:1993 213:1934 214:855 215:103 216:5109
217:1542 218:543 219:319 220:1231 221:557 222:323
223:337

End of report
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