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.

Tuesday, May 1, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 02 May, 2012

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

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

BGP routing table entries examined: 407525
Prefixes after maximum aggregation: 173096
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 198337
Total ASes present in the Internet Routing Table: 40847
Prefixes per ASN: 9.98
Origin-only ASes present in the Internet Routing Table: 33116
Origin ASes announcing only one prefix: 15620
Transit ASes present in the Internet Routing Table: 5458
Transit-only ASes present in the Internet Routing Table: 138
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: 397
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: 2273
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: 108
Number of addresses announced to Internet: 2540518928
Equivalent to 151 /8s, 109 /16s and 62 /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: 173868

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

Prefixes being announced by APNIC Region ASes: 99495
Total APNIC prefixes after maximum aggregation: 32305
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 95978
Unique aggregates announced from the APNIC address blocks: 39884
APNIC Region origin ASes present in the Internet Routing Table: 4686
APNIC Prefixes per ASN: 20.48
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 730
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: 192
Number of APNIC addresses announced to Internet: 644314208
Equivalent to 38 /8s, 103 /16s and 116 /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: 150318
Total ARIN prefixes after maximum aggregation: 76365
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121380
Unique aggregates announced from the ARIN address blocks: 50576
ARIN Region origin ASes present in the Internet Routing Table: 15056
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5732
ARIN Region transit ASes present in the Internet Routing Table: 1586
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: 807250880
Equivalent to 48 /8s, 29 /16s and 171 /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: 101790
Total RIPE prefixes after maximum aggregation: 53924
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93710
Unique aggregates announced from the RIPE address blocks: 58456
RIPE Region origin ASes present in the Internet Routing Table: 16526
RIPE Prefixes per ASN: 5.67
RIPE Region origin ASes announcing only one prefix: 8044
RIPE Region transit ASes present in the Internet Routing Table: 2628
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: 1527
Number of RIPE addresses announced to Internet: 511393736
Equivalent to 30 /8s, 123 /16s and 63 /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: 41084
Total LACNIC prefixes after maximum aggregation: 8283
LACNIC Deaggregation factor: 4.96
Prefixes being announced from the LACNIC address blocks: 41002
Unique aggregates announced from the LACNIC address blocks: 20287
LACNIC Region origin ASes present in the Internet Routing Table: 1593
LACNIC Prefixes per ASN: 25.74
LACNIC Region origin ASes announcing only one prefix: 437
LACNIC Region transit ASes present in the Internet Routing Table: 300
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: 532
Number of LACNIC addresses announced to Internet: 99676808
Equivalent to 5 /8s, 240 /16s and 242 /24s
Percentage of available LACNIC address space announced: 66.0

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: 8968
Total AfriNIC prefixes after maximum aggregation: 2151
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6988
Unique aggregates announced from the AfriNIC address blocks: 2231
AfriNIC Region origin ASes present in the Internet Routing Table: 536
AfriNIC Prefixes per ASN: 13.04
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 121
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: 31778816
Equivalent to 1 /8s, 228 /16s and 232 /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 2484 11113 1012 Korea Telecom (KIX)
17974 1865 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1680 301 87 TPG Internet Pty Ltd
4755 1577 385 156 TATA Communications formerly
9829 1260 1069 30 BSNL National Internet Backbo
7552 1169 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 958 291 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 986 158 Windstream Communications Inc
18566 2091 382 179 Covad Communications
1785 1906 680 130 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1598 1044 383 Time Warner Telecom
22773 1590 2911 115 Cox Communications, Inc.
30036 1424 261 769 Mediacom Communications Corp
7018 1247 9774 817 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 1695 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
34984 684 188 172 BILISIM TELEKOM
31148 682 37 9 FreeNet ISP
6830 655 2215 426 UPC Distribution Services
12479 650 668 66 Uni2 Autonomous System
20940 641 208 502 Akamai Technologies European
8551 571 360 80 Bezeq International
3320 531 8441 397 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 1817 1114 62 NET Servicos de Comunicao S.A
6503 1532 418 65 AVANTEL, S.A.
8151 1481 3000 344 UniNet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 903 745 34 Tim Brasil S.A.
27947 685 74 98 Telconet S.A
11172 641 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 1308 958 13 TEDATA
24863 843 274 35 LINKdotNET AS number
6713 493 649 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
16637 174 666 83 MTN Network Solutions
15706 169 32 6 Sudatel Internet Exchange Aut
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 986 158 Windstream Communications Inc
4766 2484 11113 1012 Korea Telecom (KIX)
18566 2091 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 1817 1114 62 NET Servicos de Comunicao S.A
8402 1695 544 16 Corbina telecom
7545 1680 301 87 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 3211 Windstream Communications Inc
18566 2091 1912 Covad Communications
17974 1865 1792 PT TELEKOMUNIKASI INDONESIA
1785 1906 1776 PaeTec Communications, Inc.
28573 1817 1755 NET Servicos de Comunicao S.A
8402 1695 1679 Corbina telecom
10620 1854 1675 TVCABLE BOGOTA
7545 1680 1593 TPG Internet Pty Ltd
22773 1590 1475 Cox Communications, Inc.
4766 2484 1472 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
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
27.54.144.0/24 45774 Chandra Net Pvt. Limited, Ind

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 /14:832 /15:1489 /16:12231 /17:6247 /18:10550
/19:20630 /20:29037 /21:30105 /22:40613 /23:38092 /24:213182
/25:1202 /26:1431 /27:783 /28:163 /29:67 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3027 3369 Windstream Communications Inc
6389 2143 3425 bellsouth.net, inc.
18566 2040 2091 Covad Communications
10620 1712 1854 TVCABLE BOGOTA
8402 1673 1695 Corbina telecom
30036 1368 1424 Mediacom Communications Corp
6503 1290 1532 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1109 1308 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)
----------------------------------------------

1:537 2:565 4:14 6:3 8:405 12:1989
13:1 14:610 15:12 16:3 17:5 20:23
23:168 24:1763 27:1275 31:951 32:57 33:2
34:2 36:8 37:424 38:797 40:120 41:3109
42:134 44:3 46:1483 47:3 49:414 50:542
52:13 54:10 55:9 56:3 57:31 58:959
59:491 60:254 61:1205 62:979 63:2005 64:4176
65:2255 66:4469 67:2037 68:1164 69:3175 70:903
71:484 72:1827 74:2612 75:494 76:317 77:945
78:1011 79:489 80:1208 81:906 82:671 83:549
84:481 85:1210 86:411 87:927 88:340 89:1635
90:291 91:4772 92:520 93:1507 94:1502 95:890
96:357 97:315 98:895 99:37 100:7 101:185
103:1032 106:102 107:191 108:271 109:1311 110:758
111:924 112:453 113:600 114:643 115:809 116:928
117:720 118:906 119:1229 120:352 121:692 122:1669
123:1105 124:1381 125:1245 128:563 129:194 130:255
131:619 132:178 133:22 134:245 135:62 136:213
137:175 138:356 139:163 140:486 141:244 142:406
143:394 144:519 145:74 146:499 147:281 148:770
149:306 150:157 151:180 152:464 153:172 154:12
155:399 156:214 157:375 158:176 159:541 160:338
161:260 162:348 163:191 164:580 165:398 166:573
167:467 168:820 169:128 170:860 171:127 172:2
173:1762 174:576 175:436 176:685 177:696 178:1358
180:1207 181:82 182:830 183:290 184:464 185:1
186:2243 187:1060 188:1225 189:1800 190:5558 192:6017
193:5548 194:4651 195:3601 196:1277 197:135 198:3651
199:4561 200:5824 201:1938 202:8518 203:8621 204:4328
205:2495 206:2744 207:2803 208:4050 209:3616 210:2738
211:1479 212:1996 213:1924 214:851 215:104 216:5117
217:1534 218:544 219:318 220:1231 221:557 222:324
223:332

End of report
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