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.

Sunday, May 27, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 28 May, 2012

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

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

BGP routing table entries examined: 411441
Prefixes after maximum aggregation: 174282
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 200135
Total ASes present in the Internet Routing Table: 41118
Prefixes per ASN: 10.01
Origin-only ASes present in the Internet Routing Table: 33223
Origin ASes announcing only one prefix: 15647
Transit ASes present in the Internet Routing Table: 5500
Transit-only ASes present in the Internet Routing Table: 134
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 28
Max AS path prepend of ASN (36992) 22
Prefixes from unregistered ASNs in the Routing Table: 380
Unregistered ASNs in the Routing Table: 133
Number of 32-bit ASNs allocated by the RIRs: 2759
Number of 32-bit ASNs visible in the Routing Table: 2395
Prefixes from 32-bit ASNs in the Routing Table: 6085
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 105
Number of addresses announced to Internet: 2553427376
Equivalent to 152 /8s, 50 /16s and 53 /24s
Percentage of available address space announced: 68.9
Percentage of allocated address space announced: 69.0
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 175335

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

Prefixes being announced by APNIC Region ASes: 100514
Total APNIC prefixes after maximum aggregation: 32453
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 96950
Unique aggregates announced from the APNIC address blocks: 40062
APNIC Region origin ASes present in the Internet Routing Table: 4697
APNIC Prefixes per ASN: 20.64
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 733
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 220
Number of APNIC addresses announced to Internet: 646716736
Equivalent to 38 /8s, 140 /16s and 29 /24s
Percentage of available APNIC address space announced: 82.0

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: 151350
Total ARIN prefixes after maximum aggregation: 76851
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121847
Unique aggregates announced from the ARIN address blocks: 51092
ARIN Region origin ASes present in the Internet Routing Table: 15133
ARIN Prefixes per ASN: 8.05
ARIN Region origin ASes announcing only one prefix: 5745
ARIN Region transit ASes present in the Internet Routing Table: 1599
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: 812320704
Equivalent to 48 /8s, 107 /16s and 7 /24s
Percentage of available ARIN address space announced: 64.8

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: 102326
Total RIPE prefixes after maximum aggregation: 54500
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94385
Unique aggregates announced from the RIPE address blocks: 59189
RIPE Region origin ASes present in the Internet Routing Table: 16588
RIPE Prefixes per ASN: 5.69
RIPE Region origin ASes announcing only one prefix: 8055
RIPE Region transit ASes present in the Internet Routing Table: 2659
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: 1592
Number of RIPE addresses announced to Internet: 514358920
Equivalent to 30 /8s, 168 /16s and 126 /24s
Percentage of available RIPE address space announced: 82.9

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: 41664
Total LACNIC prefixes after maximum aggregation: 8237
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 41806
Unique aggregates announced from the LACNIC address blocks: 20434
LACNIC Region origin ASes present in the Internet Routing Table: 1595
LACNIC Prefixes per ASN: 26.21
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 304
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 18
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 561
Number of LACNIC addresses announced to Internet: 101353352
Equivalent to 6 /8s, 10 /16s and 135 /24s
Percentage of available LACNIC address space announced: 67.1

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: 9314
Total AfriNIC prefixes after maximum aggregation: 2177
AfriNIC Deaggregation factor: 4.28
Prefixes being announced from the AfriNIC address blocks: 7366
Unique aggregates announced from the AfriNIC address blocks: 2204
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.64
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 119
Average AfriNIC Region AS path length visible: 4.5
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: 31713280
Equivalent to 1 /8s, 227 /16s and 232 /24s
Percentage of available AfriNIC address space announced: 47.3

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 2635 11113 1119 Korea Telecom (KIX)
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1671 301 87 TPG Internet Pty Ltd
4755 1576 385 155 TATA Communications formerly
9829 1298 1085 28 BSNL National Internet Backbo
7552 1173 1062 11 Vietel Corporation
9583 1156 87 503 Sify Limited
4808 1105 2050 317 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 63 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 3411 3807 192 bellsouth.net, inc.
7029 3335 986 159 Windstream Communications Inc
18566 2093 382 181 Covad Communications
1785 1909 681 131 PaeTec Communications, Inc.
20115 1639 1566 616 Charter Communications
22773 1609 2911 121 Cox Communications, Inc.
4323 1567 1040 380 Time Warner Telecom
30036 1408 261 756 Mediacom Communications Corp
7018 1220 10031 819 AT&T WorldNet Services
7011 1188 317 681 Citizens Utilities

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 1743 544 16 Corbina telecom
2118 1312 97 14 EUnet/RELCOM Autonomous Syste
34984 698 188 172 BILISIM TELEKOM
12479 692 678 70 Uni2 Autonomous System
31148 684 37 9 FreeNet ISP
20940 657 216 512 Akamai Technologies European
6830 655 2215 426 UPC Distribution Services
8551 577 362 71 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 471 2108 407 TDC Tele Danmark

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 1920 340 201 TVCABLE BOGOTA
28573 1894 1171 59 NET Servicos de Comunicao S.A
6503 1538 418 65 AVANTEL, S.A.
8151 1480 3054 336 UniNet S.A. de C.V.
7303 1435 901 191 Telecom Argentina Stet-France
26615 902 760 32 Tim Brasil S.A.
27947 688 73 94 Telconet S.A
11172 642 91 73 Servicios Alestra S.A de C.V
3816 585 247 89 Empresa Nacional de Telecomun
22047 582 326 15 VTR PUNTO NET S.A.

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 1370 958 13 TEDATA
24863 846 274 35 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 186 12 21 Starcomms Nigeria Limited
16637 171 666 83 MTN Network Solutions
15706 164 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 3411 3807 192 bellsouth.net, inc.
7029 3335 986 159 Windstream Communications Inc
4766 2635 11113 1119 Korea Telecom (KIX)
18566 2093 382 181 Covad Communications
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
10620 1920 340 201 TVCABLE BOGOTA
1785 1909 681 131 PaeTec Communications, Inc.
28573 1894 1171 59 NET Servicos de Comunicao S.A
8402 1743 544 16 Corbina telecom
7545 1671 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 3335 3176 Windstream Communications Inc
18566 2093 1912 Covad Communications
17974 1924 1844 PT TELEKOMUNIKASI INDONESIA
28573 1894 1835 NET Servicos de Comunicao S.A
1785 1909 1778 PaeTec Communications, Inc.
8402 1743 1727 Corbina telecom
10620 1920 1719 TVCABLE BOGOTA
7545 1671 1584 TPG Internet Pty Ltd
4766 2635 1516 Korea Telecom (KIX)
22773 1609 1488 Cox Communications, Inc.

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
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
32873 UNALLOCATED 12.46.102.0/24 10912 InterNAP Network Ser
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic

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
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
27.112.114.0/24 23884 Proimage Engineering and Comm
41.222.79.0/24 36938 >>UNKNOWN<<

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 /10:29 /11:81 /12:235
/13:462 /14:832 /15:1502 /16:12302 /17:6297 /18:10616
/19:20778 /20:29476 /21:30839 /22:40528 /23:38458 /24:215205
/25:1222 /26:1455 /27:822 /28:166 /29:66 /30:17
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2995 3335 Windstream Communications Inc
6389 2131 3411 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1734 1920 TVCABLE BOGOTA
8402 1721 1743 Corbina telecom
30036 1349 1408 Mediacom Communications Corp
6503 1292 1538 AVANTEL, S.A.
8452 1171 1370 TEDATA
11492 1150 1187 Cable One
7011 1073 1188 Citizens Utilities

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

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

1:549 2:754 4:13 5:35 6:3 8:420
12:2004 13:1 14:615 15:12 16:3 17:5
20:23 23:170 24:1775 27:1316 31:1025 32:57
33:2 34:2 36:8 37:624 38:808 40:121
41:3184 42:137 44:3 46:1424 47:3 49:450
50:550 52:13 54:12 55:8 56:3 57:33
58:959 59:495 60:254 61:1218 62:982 63:2010
64:4237 65:2246 66:4472 67:2008 68:1160 69:3192
70:933 71:494 72:1824 74:2600 75:494 76:328
77:951 78:984 79:485 80:1221 81:938 82:661
83:544 84:491 85:1222 86:440 87:906 88:334
89:1721 90:287 91:4855 92:543 93:1351 94:1517
95:1169 96:362 97:313 98:861 99:38 100:7
101:193 103:1108 106:104 107:185 108:309 109:1333
110:754 111:923 112:409 113:602 114:628 115:844
116:937 117:724 118:902 119:1236 120:357 121:698
122:1664 123:1101 124:1378 125:1254 128:555 129:196
130:246 131:631 132:286 133:22 134:248 135:59
136:209 137:190 138:359 139:186 140:496 141:244
142:415 143:555 144:537 145:71 146:487 147:283
148:773 149:306 150:192 151:177 152:467 153:172
154:12 155:401 156:222 157:381 158:184 159:557
160:339 161:265 162:345 163:190 164:598 165:396
166:593 167:468 168:862 169:126 170:872 171:132
172:4 173:1753 174:579 175:430 176:525 177:802
178:1380 180:1217 181:88 182:1006 183:226 184:497
185:1 186:2278 187:1097 188:1276 189:1819 190:5565
192:6002 193:5569 194:4518 195:3421 196:1212 197:148
198:3656 199:4655 200:5834 201:1942 202:8616 203:8592
204:4337 205:2548 206:2762 207:2801 208:4058 209:3623
210:2766 211:1536 212:2011 213:1920 214:843 215:103
216:5095 217:1521 218:552 219:315 220:1239 221:563
222:325 223:359

End of report
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