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.

Monday, March 19, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 20 Mar, 2012

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

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

BGP routing table entries examined: 401793
Prefixes after maximum aggregation: 171093
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 194914
Total ASes present in the Internet Routing Table: 40414
Prefixes per ASN: 9.94
Origin-only ASes present in the Internet Routing Table: 32890
Origin ASes announcing only one prefix: 15477
Transit ASes present in the Internet Routing Table: 5427
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.4
Max AS path length visible: 33
Max AS path prepend of ASN (48687) 24
Prefixes from unregistered ASNs in the Routing Table: 425
Unregistered ASNs in the Routing Table: 195
Number of 32-bit ASNs allocated by the RIRs: 2323
Number of 32-bit ASNs visible in the Routing Table: 2097
Prefixes from 32-bit ASNs in the Routing Table: 5130
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 767
Number of addresses announced to Internet: 2526911376
Equivalent to 150 /8s, 157 /16s and 155 /24s
Percentage of available address space announced: 68.2
Percentage of allocated address space announced: 68.2
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 92.1
Total number of prefixes smaller than registry allocations: 170768

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

Prefixes being announced by APNIC Region ASes: 98322
Total APNIC prefixes after maximum aggregation: 31984
APNIC Deaggregation factor: 3.07
Prefixes being announced from the APNIC address blocks: 94729
Unique aggregates announced from the APNIC address blocks: 39262
APNIC Region origin ASes present in the Internet Routing Table: 4668
APNIC Prefixes per ASN: 20.29
APNIC Region origin ASes announcing only one prefix: 1231
APNIC Region transit ASes present in the Internet Routing Table: 728
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 18
Number of APNIC region 32-bit ASNs visible in the Routing Table: 166
Number of APNIC addresses announced to Internet: 640667232
Equivalent to 38 /8s, 47 /16s and 206 /24s
Percentage of available APNIC address space announced: 81.2

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: 148955
Total ARIN prefixes after maximum aggregation: 75741
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 120474
Unique aggregates announced from the ARIN address blocks: 49878
ARIN Region origin ASes present in the Internet Routing Table: 14940
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5671
ARIN Region transit ASes present in the Internet Routing Table: 1575
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 16
Number of ARIN addresses announced to Internet: 806585088
Equivalent to 48 /8s, 19 /16s and 131 /24s
Percentage of available ARIN address space announced: 64.1

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: 101095
Total RIPE prefixes after maximum aggregation: 52990
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 92557
Unique aggregates announced from the RIPE address blocks: 57067
RIPE Region origin ASes present in the Internet Routing Table: 16350
RIPE Prefixes per ASN: 5.66
RIPE Region origin ASes announcing only one prefix: 7969
RIPE Region transit ASes present in the Internet Routing Table: 2635
Average RIPE Region AS path length visible: 4.7
Max RIPE Region AS path length visible: 33
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1425
Number of RIPE addresses announced to Internet: 502134792
Equivalent to 29 /8s, 237 /16s and 248 /24s
Percentage of available RIPE address space announced: 80.9

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: 39098
Total LACNIC prefixes after maximum aggregation: 8101
LACNIC Deaggregation factor: 4.83
Prefixes being announced from the LACNIC address blocks: 38863
Unique aggregates announced from the LACNIC address blocks: 19661
LACNIC Region origin ASes present in the Internet Routing Table: 1575
LACNIC Prefixes per ASN: 24.67
LACNIC Region origin ASes announcing only one prefix: 436
LACNIC Region transit ASes present in the Internet Routing Table: 291
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 17
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 485
Number of LACNIC addresses announced to Internet: 98497416
Equivalent to 5 /8s, 222 /16s and 243 /24s
Percentage of available LACNIC address space announced: 65.2

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: 8917
Total AfriNIC prefixes after maximum aggregation: 2115
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 7016
Unique aggregates announced from the AfriNIC address blocks: 2185
AfriNIC Region origin ASes present in the Internet Routing Table: 525
AfriNIC Prefixes per ASN: 13.36
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 118
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: 31518976
Equivalent to 1 /8s, 224 /16s and 241 /24s
Percentage of available AfriNIC address space announced: 47.0

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 2495 11110 996 Korea Telecom (KIX)
17974 1739 500 61 PT TELEKOMUNIKASI INDONESIA
7545 1654 303 87 TPG Internet Pty Ltd
4755 1569 386 160 TATA Communications formerly
9583 1223 93 527 Sify Limited
9829 1188 1001 30 BSNL National Internet Backbo
7552 1165 1062 11 Vietel Corporation
4808 1096 2048 312 CNCGROUP IP network: China169
24560 1015 384 166 Bharti Airtel Ltd., Telemedia
18101 948 130 160 Reliance Infocom Ltd Internet

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
7029 3382 1006 158 Windstream Communications Inc
6389 3375 3807 198 bellsouth.net, inc.
18566 2093 383 179 Covad Communications
1785 1883 680 128 PaeTec Communications, Inc.
20115 1631 1558 628 Charter Communications
4323 1603 1060 382 Time Warner Telecom
22773 1547 2910 111 Cox Communications, Inc.
30036 1398 252 744 Mediacom Communications Corp
7018 1276 9776 836 AT&T WorldNet Services
11492 1164 212 415 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 1819 544 16 Corbina telecom
2118 1427 97 13 EUnet/RELCOM Autonomous Syste
15557 1089 2247 55 LDCOM NETWORKS
34984 664 188 172 BILISIM TELEKOM
6830 641 1943 412 UPC Distribution Services
12479 638 653 67 Uni2 Autonomous System
20940 628 201 487 Akamai Technologies European
8551 574 360 81 Bezeq International
31148 539 37 9 FreeNet ISP
3320 532 8442 398 Deutsche Telekom AG

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 1801 329 130 TVCABLE BOGOTA
28573 1709 1094 58 NET Servicos de Comunicao S.A
8151 1479 3014 347 UniNet S.A. de C.V.
7303 1331 823 185 Telecom Argentina Stet-France
26615 900 676 31 Tim Brasil S.A.
27947 680 68 108 Telconet S.A
11172 635 91 73 Servicios Alestra S.A de C.V
22047 584 326 15 VTR PUNTO NET S.A.
3816 560 240 89 Empresa Nacional de Telecomun
6503 558 418 65 AVANTEL, 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 1259 958 13 TEDATA
24863 840 274 37 LINKdotNET AS number
6713 487 649 18 Itissalat Al-MAGHRIB
3741 271 923 228 The Internet Solution
15706 227 32 6 Sudatel Internet Exchange Aut
12258 197 28 62 Vodacom Internet Company
24835 177 80 8 RAYA Telecom - Egypt
15399 168 29 12 Wananchi Online Limited
33776 162 12 25 Starcomms Nigeria Limited
36923 157 20 4 Swift Networks Limited

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
7029 3382 1006 158 Windstream Communications Inc
6389 3375 3807 198 bellsouth.net, inc.
4766 2495 11110 996 Korea Telecom (KIX)
18566 2093 383 179 Covad Communications
1785 1883 680 128 PaeTec Communications, Inc.
8402 1819 544 16 Corbina telecom
10620 1801 329 130 TVCABLE BOGOTA
17974 1739 500 61 PT TELEKOMUNIKASI INDONESIA
28573 1709 1094 58 NET Servicos de Comunicao S.A
7545 1654 303 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
6389 3375 3177 bellsouth.net, inc.
18566 2093 1914 Covad Communications
8402 1819 1803 Corbina telecom
1785 1883 1755 PaeTec Communications, Inc.
17974 1739 1678 PT TELEKOMUNIKASI INDONESIA
10620 1801 1671 TVCABLE BOGOTA
28573 1709 1651 NET Servicos de Comunicao S.A
7545 1654 1567 TPG Internet Pty Ltd
4766 2495 1499 Korea Telecom (KIX)
22773 1547 1436 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
54439 UNALLOCATED 8.25.174.0/24 3356 Level 3 Communicatio
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

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
23.27.0.0/20 54500 EGIHosting
23.27.16.0/20 54500 EGIHosting

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 /12:235
/13:458 /14:821 /15:1475 /16:12178 /17:6232 /18:10419
/19:20518 /20:28650 /21:29570 /22:40019 /23:37358 /24:209989
/25:1218 /26:1457 /27:792 /28:167 /29:61 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3038 3382 Windstream Communications Inc
6389 2090 3375 bellsouth.net, inc.
18566 2042 2093 Covad Communications
8402 1796 1819 Corbina telecom
10620 1698 1801 TVCABLE BOGOTA
30036 1347 1398 Mediacom Communications Corp
11492 1127 1164 Cable One
8452 1069 1259 TEDATA
1785 1065 1883 PaeTec Communications, Inc.
7011 1038 1152 Citizens Utilities

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

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

1:532 2:794 4:14 6:3 8:394 12:1974
13:1 14:603 15:12 16:3 17:7 20:8
23:144 24:1753 27:1246 31:925 32:62 33:2
34:2 36:8 37:286 38:777 40:122 41:3119
42:128 44:3 46:1430 47:3 49:336 50:515
52:13 54:5 55:8 56:3 57:37 58:958
59:494 60:278 61:1196 62:976 63:2016 64:4196
65:2284 66:4505 67:2001 68:1159 69:3176 70:900
71:389 72:1780 74:2586 75:489 76:319 77:966
78:979 79:495 80:1240 81:903 82:648 83:554
84:598 85:1188 86:727 87:910 88:334 89:1563
90:288 91:4615 92:518 93:1501 94:1408 95:1126
96:374 97:316 98:823 99:38 100:6 101:202
103:911 106:64 107:173 108:206 109:1543 110:751
111:880 112:443 113:561 114:637 115:776 116:868
117:722 118:906 119:1206 120:337 121:695 122:1651
123:1077 124:1363 125:1277 128:545 129:190 130:263
131:593 132:170 133:21 134:241 135:63 136:212
137:186 138:275 139:145 140:494 141:241 142:391
143:431 144:500 145:69 146:487 147:242 148:721
149:295 150:157 151:174 152:455 153:171 154:7
155:428 156:212 157:379 158:163 159:519 160:325
161:250 162:343 163:186 164:532 165:394 166:563
167:462 168:800 169:147 170:842 171:121 172:4
173:1716 174:591 175:431 176:458 177:571 178:1291
180:1131 181:73 182:764 183:276 184:442 185:1
186:2118 187:847 188:1062 189:1200 190:5526 192:5991
193:5594 194:4567 195:3643 196:1285 197:186 198:3620
199:4468 200:5758 201:1649 202:8404 203:8587 204:4350
205:2466 206:2739 207:2797 208:4074 209:3601 210:2759
211:1465 212:1971 213:1904 214:870 215:108 216:5056
217:1526 218:539 219:333 220:1230 221:552 222:324
223:325

End of report
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