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.

Wednesday, May 2, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 03 May, 2012

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

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

BGP routing table entries examined: 407524
Prefixes after maximum aggregation: 173133
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 198201
Total ASes present in the Internet Routing Table: 40852
Prefixes per ASN: 9.98
Origin-only ASes present in the Internet Routing Table: 33118
Origin ASes announcing only one prefix: 15619
Transit ASes present in the Internet Routing Table: 5464
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: 395
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 2656
Number of 32-bit ASNs visible in the Routing Table: 2270
Prefixes from 32-bit ASNs in the Routing Table: 5693
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 114
Number of addresses announced to Internet: 2540584720
Equivalent to 151 /8s, 110 /16s and 63 /24s
Percentage of available address space announced: 68.5
Percentage of allocated address space announced: 68.6
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: 173827

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

Prefixes being announced by APNIC Region ASes: 99494
Total APNIC prefixes after maximum aggregation: 32259
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 95974
Unique aggregates announced from the APNIC address blocks: 39836
APNIC Region origin ASes present in the Internet Routing Table: 4688
APNIC Prefixes per ASN: 20.47
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 728
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: 191
Number of APNIC addresses announced to Internet: 644276320
Equivalent to 38 /8s, 102 /16s and 224 /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: 150448
Total ARIN prefixes after maximum aggregation: 76475
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121384
Unique aggregates announced from the ARIN address blocks: 50609
ARIN Region origin ASes present in the Internet Routing Table: 15061
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5730
ARIN Region transit ASes present in the Internet Routing Table: 1584
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: 807420096
Equivalent to 48 /8s, 32 /16s and 64 /24s
Percentage of available ARIN address space announced: 64.4

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: 101809
Total RIPE prefixes after maximum aggregation: 53921
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93707
Unique aggregates announced from the RIPE address blocks: 58354
RIPE Region origin ASes present in the Internet Routing Table: 16527
RIPE Prefixes per ASN: 5.67
RIPE Region origin ASes announcing only one prefix: 8042
RIPE Region transit ASes present in the Internet Routing Table: 2637
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: 1533
Number of RIPE addresses announced to Internet: 511262152
Equivalent to 30 /8s, 121 /16s and 61 /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: 40979
Total LACNIC prefixes after maximum aggregation: 8254
LACNIC Deaggregation factor: 4.96
Prefixes being announced from the LACNIC address blocks: 40881
Unique aggregates announced from the LACNIC address blocks: 20279
LACNIC Region origin ASes present in the Internet Routing Table: 1591
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: 299
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: 524
Number of LACNIC addresses announced to Internet: 99740040
Equivalent to 5 /8s, 241 /16s and 233 /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: 8929
Total AfriNIC prefixes after maximum aggregation: 2156
AfriNIC Deaggregation factor: 4.14
Prefixes being announced from the AfriNIC address blocks: 6959
Unique aggregates announced from the AfriNIC address blocks: 2220
AfriNIC Region origin ASes present in the Internet Routing Table: 536
AfriNIC Prefixes per ASN: 12.98
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 31798784
Equivalent to 1 /8s, 229 /16s and 54 /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 2482 11113 1011 Korea Telecom (KIX)
17974 1865 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1678 301 86 TPG Internet Pty Ltd
4755 1577 385 156 TATA Communications formerly
9829 1262 1069 30 BSNL National Internet Backbo
7552 1175 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 960 291 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 3424 3807 193 bellsouth.net, inc.
7029 3371 986 159 Windstream Communications Inc
18566 2092 382 179 Covad Communications
1785 1906 680 130 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1606 1044 383 Time Warner Telecom
22773 1590 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 1729 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
34984 687 188 172 BILISIM TELEKOM
31148 682 37 9 FreeNet ISP
6830 655 2215 426 UPC Distribution Services
12479 650 668 66 Uni2 Autonomous System
20940 642 208 502 Akamai Technologies European
8551 572 360 80 Bezeq International
3320 530 8441 396 Deutsche Telekom AG
2578 500 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 1772 1114 58 NET Servicos de Comunicao S.A
6503 1532 418 65 AVANTEL, S.A.
8151 1482 3000 344 UniNet S.A. de C.V.
7303 1363 830 188 Telecom Argentina Stet-France
26615 904 761 33 Tim Brasil S.A.
27947 685 74 98 Telconet S.A
11172 642 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 1310 958 13 TEDATA
24863 835 274 39 LINKdotNET AS number
6713 486 649 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 3424 3807 193 bellsouth.net, inc.
7029 3371 986 159 Windstream Communications Inc
4766 2482 11113 1011 Korea Telecom (KIX)
18566 2092 382 179 Covad Communications
1785 1906 680 130 PaeTec Communications, Inc.
17974 1865 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1854 332 179 TVCABLE BOGOTA
28573 1772 1114 58 NET Servicos de Comunicao S.A
8402 1729 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 3371 3212 Windstream Communications Inc
18566 2092 1913 Covad Communications
17974 1865 1792 PT TELEKOMUNIKASI INDONESIA
1785 1906 1776 PaeTec Communications, Inc.
28573 1772 1714 NET Servicos de Comunicao S.A
8402 1729 1713 Corbina telecom
10620 1854 1675 TVCABLE BOGOTA
7545 1678 1592 TPG Internet Pty Ltd
22773 1590 1475 Cox Communications, Inc.
4766 2482 1471 Korea Telecom (KIX)

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
5.10.144.0/20 25160 Vorboss LTD AS Number
5.11.64.0/20 31214 TIS-DIALOG Autonomous system
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
14.192.28.0/22 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 /11:81 /12:234
/13:461 /14:831 /15:1492 /16:12240 /17:6250 /18:10562
/19:20624 /20:29058 /21:30066 /22:40573 /23:38086 /24:213226
/25:1199 /26:1431 /27:784 /28:164 /29:67 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3028 3371 Windstream Communications Inc
6389 2142 3424 bellsouth.net, inc.
18566 2041 2092 Covad Communications
10620 1712 1854 TVCABLE BOGOTA
8402 1707 1729 Corbina telecom
30036 1366 1422 Mediacom Communications Corp
6503 1290 1532 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1109 1310 TEDATA
1785 1072 1906 PaeTec Communications, Inc.

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

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

1:538 2:624 4:14 6:3 8:406 12:1992
13:1 14:613 15:12 16:3 17:5 20:23
23:165 24:1762 27:1290 31:954 32:57 33:2
34:2 36:8 37:427 38:797 40:120 41:3083
42:134 44:3 46:1425 47:3 49:414 50:542
52:13 54:10 55:10 56:3 57:31 58:958
59:493 60:254 61:1205 62:982 63:2009 64:4170
65:2254 66:4471 67:2034 68:1163 69:3176 70:903
71:484 72:1827 74:2613 75:494 76:317 77:945
78:982 79:489 80:1213 81:905 82:662 83:546
84:483 85:1207 86:411 87:928 88:339 89:1634
90:291 91:4774 92:521 93:1506 94:1498 95:891
96:359 97:315 98:882 99:37 100:7 101:185
103:1038 106:86 107:189 108:271 109:1313 110:756
111:920 112:453 113:600 114:644 115:807 116:927
117:719 118:908 119:1230 120:354 121:692 122:1671
123:1104 124:1385 125:1246 128:559 129:194 130:255
131:620 132:177 133:22 134:244 135:62 136:213
137:177 138:356 139:166 140:492 141:248 142:407
143:535 144:521 145:70 146:500 147:280 148:771
149:306 150:156 151:179 152:464 153:172 154:12
155:399 156:216 157:375 158:175 159:537 160:338
161:260 162:348 163:191 164:584 165:398 166:573
167:467 168:820 169:128 170:859 171:127 172:2
173:1765 174:561 175:436 176:669 177:696 178:1358
180:1195 181:82 182:829 183:292 184:463 185:1
186:2246 187:1060 188:1226 189:1795 190:5501 192:6016
193:5550 194:4660 195:3599 196:1257 197:131 198:3651
199:4566 200:5828 201:1938 202:8536 203:8624 204:4336
205:2502 206:2751 207:2794 208:4052 209:3624 210:2737
211:1476 212:1991 213:1932 214:855 215:104 216:5122
217:1538 218:543 219:319 220:1230 221:558 222:323
223:334

End of report
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