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 23, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 24 May, 2012

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

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

BGP routing table entries examined: 410688
Prefixes after maximum aggregation: 174197
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 200110
Total ASes present in the Internet Routing Table: 41076
Prefixes per ASN: 10.00
Origin-only ASes present in the Internet Routing Table: 33216
Origin ASes announcing only one prefix: 15649
Transit ASes present in the Internet Routing Table: 5489
Transit-only ASes present in the Internet Routing Table: 136
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 30
Max AS path prepend of ASN ( 2115) 25
Prefixes from unregistered ASNs in the Routing Table: 378
Unregistered ASNs in the Routing Table: 134
Number of 32-bit ASNs allocated by the RIRs: 2733
Number of 32-bit ASNs visible in the Routing Table: 2371
Prefixes from 32-bit ASNs in the Routing Table: 6031
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 117
Number of addresses announced to Internet: 2553016752
Equivalent to 152 /8s, 43 /16s and 241 /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: 92.6
Total number of prefixes smaller than registry allocations: 175508

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

Prefixes being announced by APNIC Region ASes: 100429
Total APNIC prefixes after maximum aggregation: 32477
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96887
Unique aggregates announced from the APNIC address blocks: 40024
APNIC Region origin ASes present in the Internet Routing Table: 4690
APNIC Prefixes per ASN: 20.66
APNIC Region origin ASes announcing only one prefix: 1238
APNIC Region transit ASes present in the Internet Routing Table: 731
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 22
Number of APNIC region 32-bit ASNs visible in the Routing Table: 217
Number of APNIC addresses announced to Internet: 646661440
Equivalent to 38 /8s, 139 /16s and 69 /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: 151630
Total ARIN prefixes after maximum aggregation: 76785
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 122018
Unique aggregates announced from the ARIN address blocks: 51035
ARIN Region origin ASes present in the Internet Routing Table: 15124
ARIN Prefixes per ASN: 8.07
ARIN Region origin ASes announcing only one prefix: 5748
ARIN Region transit ASes present in the Internet Routing Table: 1597
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: 812308928
Equivalent to 48 /8s, 106 /16s and 217 /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: 101421
Total RIPE prefixes after maximum aggregation: 54413
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 93507
Unique aggregates announced from the RIPE address blocks: 59211
RIPE Region origin ASes present in the Internet Routing Table: 16582
RIPE Prefixes per ASN: 5.64
RIPE Region origin ASes announcing only one prefix: 8055
RIPE Region transit ASes present in the Internet Routing Table: 2654
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1579
Number of RIPE addresses announced to Internet: 514060936
Equivalent to 30 /8s, 163 /16s and 242 /24s
Percentage of available RIPE address space announced: 82.8

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: 41666
Total LACNIC prefixes after maximum aggregation: 8288
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 41730
Unique aggregates announced from the LACNIC address blocks: 20450
LACNIC Region origin ASes present in the Internet Routing Table: 1596
LACNIC Prefixes per ASN: 26.15
LACNIC Region origin ASes announcing only one prefix: 440
LACNIC Region transit ASes present in the Internet Routing Table: 307
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 553
Number of LACNIC addresses announced to Internet: 101336456
Equivalent to 6 /8s, 10 /16s and 69 /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: 9321
Total AfriNIC prefixes after maximum aggregation: 2170
AfriNIC Deaggregation factor: 4.30
Prefixes being announced from the AfriNIC address blocks: 7374
Unique aggregates announced from the AfriNIC address blocks: 2207
AfriNIC Region origin ASes present in the Internet Routing Table: 541
AfriNIC Prefixes per ASN: 13.63
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: 4.5
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: 31731968
Equivalent to 1 /8s, 228 /16s and 49 /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 2632 11114 1119 Korea Telecom (KIX)
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1685 301 87 TPG Internet Pty Ltd
4755 1578 385 155 TATA Communications formerly
9829 1295 1085 28 BSNL National Internet Backbo
7552 1174 1062 11 Vietel Corporation
9583 1161 87 499 Sify Limited
4808 1100 2050 316 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 963 291 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 3413 3807 193 bellsouth.net, inc.
7029 3333 986 159 Windstream Communications Inc
18566 2095 382 178 Covad Communications
1785 1905 681 131 PaeTec Communications, Inc.
20115 1635 1565 619 Charter Communications
22773 1607 2911 121 Cox Communications, Inc.
4323 1566 1040 379 Time Warner Telecom
30036 1412 261 754 Mediacom Communications Corp
7018 1222 10031 819 AT&T WorldNet Services
7011 1187 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 1755 544 16 Corbina telecom
34984 697 188 172 BILISIM TELEKOM
31148 684 37 9 FreeNet ISP
12479 681 672 66 Uni2 Autonomous System
2118 658 97 14 EUnet/RELCOM Autonomous Syste
6830 656 2215 427 UPC Distribution Services
20940 655 216 511 Akamai Technologies European
8551 566 360 80 Bezeq International
3320 486 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 1907 338 201 TVCABLE BOGOTA
28573 1880 1170 57 NET Servicos de Comunicao S.A
6503 1540 418 66 AVANTEL, S.A.
8151 1488 3046 339 UniNet S.A. de C.V.
7303 1435 901 191 Telecom Argentina Stet-France
26615 902 760 32 Tim Brasil S.A.
27947 689 73 95 Telconet S.A
11172 642 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 579 244 99 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 1360 957 12 TEDATA
24863 846 274 35 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 261 905 222 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 192 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 3413 3807 193 bellsouth.net, inc.
7029 3333 986 159 Windstream Communications Inc
4766 2632 11114 1119 Korea Telecom (KIX)
18566 2095 382 178 Covad Communications
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
10620 1907 338 201 TVCABLE BOGOTA
1785 1905 681 131 PaeTec Communications, Inc.
28573 1880 1170 57 NET Servicos de Comunicao S.A
8402 1755 544 16 Corbina telecom
7545 1685 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 3333 3174 Windstream Communications Inc
18566 2095 1917 Covad Communications
17974 1924 1844 PT TELEKOMUNIKASI INDONESIA
28573 1880 1823 NET Servicos de Comunicao S.A
1785 1905 1774 PaeTec Communications, Inc.
8402 1755 1739 Corbina telecom
10620 1907 1706 TVCABLE BOGOTA
7545 1685 1598 TPG Internet Pty Ltd
4766 2632 1513 Korea Telecom (KIX)
22773 1607 1486 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
5.43.240.0/21 21191 SeverTransTeleCom Autonomous
5.44.0.0/20 39812 CJSC Radiotelephone AS
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 /10:29 /11:81 /12:235
/13:462 /14:832 /15:1503 /16:12295 /17:6316 /18:10614
/19:20756 /20:29460 /21:30790 /22:40380 /23:38455 /24:214666
/25:1232 /26:1458 /27:816 /28:171 /29:67 /30:17
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2993 3333 Windstream Communications Inc
6389 2132 3413 bellsouth.net, inc.
18566 2044 2095 Covad Communications
8402 1733 1755 Corbina telecom
10620 1726 1907 TVCABLE BOGOTA
30036 1353 1412 Mediacom Communications Corp
6503 1293 1540 AVANTEL, S.A.
8452 1162 1360 TEDATA
11492 1149 1186 Cable One
7011 1072 1187 Citizens Utilities

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

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

1:549 2:755 4:13 5:36 6:3 8:417
12:2006 13:1 14:615 15:12 16:3 17:5
20:23 23:170 24:1773 27:1310 31:1024 32:57
33:2 34:2 36:8 37:495 38:807 40:121
41:3195 42:137 44:3 46:1418 47:3 49:408
50:548 52:13 54:11 55:9 56:3 57:33
58:961 59:483 60:253 61:1229 62:990 63:2039
64:4228 65:2251 66:4479 67:2015 68:1161 69:3201
70:933 71:495 72:1838 74:2628 75:492 76:326
77:952 78:988 79:472 80:1215 81:935 82:661
83:543 84:487 85:1221 86:433 87:906 88:334
89:1710 90:289 91:4851 92:548 93:1359 94:1514
95:1168 96:368 97:313 98:872 99:38 100:7
101:191 103:1096 106:104 107:185 108:304 109:1336
110:768 111:909 112:409 113:601 114:624 115:840
116:937 117:720 118:908 119:1231 120:355 121:698
122:1662 123:1103 124:1380 125:1255 128:555 129:195
130:252 131:628 132:285 133:22 134:249 135:62
136:213 137:241 138:359 139:183 140:494 141:243
142:414 143:557 144:537 145:70 146:508 147:286
148:775 149:297 150:196 151:177 152:469 153:172
154:12 155:402 156:223 157:381 158:186 159:556
160:340 161:265 162:345 163:190 164:604 165:398
166:593 167:465 168:863 169:126 170:873 171:131
172:4 173:1750 174:601 175:431 176:584 177:778
178:1383 180:1215 181:85 182:1005 183:302 184:496
185:1 186:2304 187:1086 188:1277 189:1799 190:5540
192:6002 193:5437 194:4189 195:3220 196:1210 197:147
198:3663 199:4639 200:5859 201:1933 202:8594 203:8610
204:4340 205:2543 206:2765 207:2803 208:4080 209:3619
210:2766 211:1525 212:2032 213:1940 214:852 215:103
216:5095 217:1538 218:551 219:314 220:1237 221:554
222:325 223:358

End of report
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