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, May 7, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 08 May, 2012

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

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

BGP routing table entries examined: 406761
Prefixes after maximum aggregation: 173285
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 198519
Total ASes present in the Internet Routing Table: 40886
Prefixes per ASN: 9.95
Origin-only ASes present in the Internet Routing Table: 33137
Origin ASes announcing only one prefix: 15629
Transit ASes present in the Internet Routing Table: 5463
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: 403
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 2669
Number of 32-bit ASNs visible in the Routing Table: 2286
Prefixes from 32-bit ASNs in the Routing Table: 5754
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 106
Number of addresses announced to Internet: 2544275824
Equivalent to 151 /8s, 166 /16s and 145 /24s
Percentage of available address space announced: 68.6
Percentage of allocated address space announced: 68.7
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: 173633

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

Prefixes being announced by APNIC Region ASes: 99756
Total APNIC prefixes after maximum aggregation: 32274
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96201
Unique aggregates announced from the APNIC address blocks: 39818
APNIC Region origin ASes present in the Internet Routing Table: 4685
APNIC Prefixes per ASN: 20.53
APNIC Region origin ASes announcing only one prefix: 1240
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: 196
Number of APNIC addresses announced to Internet: 644337248
Equivalent to 38 /8s, 103 /16s and 206 /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: 150393
Total ARIN prefixes after maximum aggregation: 76473
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121402
Unique aggregates announced from the ARIN address blocks: 50613
ARIN Region origin ASes present in the Internet Routing Table: 15070
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5734
ARIN Region transit ASes present in the Internet Routing Table: 1589
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: 810037184
Equivalent to 48 /8s, 72 /16s and 47 /24s
Percentage of available ARIN address space announced: 64.6

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: 100489
Total RIPE prefixes after maximum aggregation: 54010
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 92517
Unique aggregates announced from the RIPE address blocks: 58538
RIPE Region origin ASes present in the Internet Routing Table: 16539
RIPE Prefixes per ASN: 5.59
RIPE Region origin ASes announcing only one prefix: 8049
RIPE Region transit ASes present in the Internet Routing Table: 2638
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: 1536
Number of RIPE addresses announced to Internet: 511865672
Equivalent to 30 /8s, 130 /16s and 115 /24s
Percentage of available RIPE address space announced: 82.5

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: 41182
Total LACNIC prefixes after maximum aggregation: 8270
LACNIC Deaggregation factor: 4.98
Prefixes being announced from the LACNIC address blocks: 41202
Unique aggregates announced from the LACNIC address blocks: 20364
LACNIC Region origin ASes present in the Internet Routing Table: 1594
LACNIC Prefixes per ASN: 25.85
LACNIC Region origin ASes announcing only one prefix: 437
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: 532
Number of LACNIC addresses announced to Internet: 100110728
Equivalent to 5 /8s, 247 /16s and 145 /24s
Percentage of available LACNIC address space announced: 66.3

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: 8969
Total AfriNIC prefixes after maximum aggregation: 2146
AfriNIC Deaggregation factor: 4.18
Prefixes being announced from the AfriNIC address blocks: 6995
Unique aggregates announced from the AfriNIC address blocks: 2230
AfriNIC Region origin ASes present in the Internet Routing Table: 536
AfriNIC Prefixes per ASN: 13.05
AfriNIC Region origin ASes announcing only one prefix: 169
AfriNIC Region transit ASes present in the Internet Routing Table: 123
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: 31802368
Equivalent to 1 /8s, 229 /16s and 68 /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 2510 11113 1013 Korea Telecom (KIX)
17974 1866 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1680 301 87 TPG Internet Pty Ltd
4755 1576 385 152 TATA Communications formerly
9829 1277 1069 30 BSNL National Internet Backbo
7552 1178 1062 11 Vietel Corporation
9583 1149 85 494 Sify Limited
4808 1109 2050 317 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 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 3374 986 159 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1897 680 131 PaeTec Communications, Inc.
20115 1640 1566 619 Charter Communications
4323 1606 1044 383 Time Warner Telecom
22773 1592 2911 115 Cox Communications, Inc.
30036 1424 261 762 Mediacom Communications Corp
7018 1248 10038 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 1625 544 16 Corbina telecom
34984 688 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
12479 673 670 68 Uni2 Autonomous System
6830 655 2215 426 UPC Distribution Services
20940 646 211 501 Akamai Technologies European
8551 573 360 80 Bezeq International
3320 534 8442 399 Deutsche Telekom AG
2578 500 33 7 Demos, Moscow, Russia
3292 473 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 1854 332 184 TVCABLE BOGOTA
28573 1828 1131 56 NET Servicos de Comunicao S.A
6503 1527 418 67 AVANTEL, S.A.
8151 1476 3001 341 UniNet S.A. de C.V.
7303 1371 837 188 Telecom Argentina Stet-France
26615 903 761 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 574 243 98 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 1307 958 13 TEDATA
24863 844 274 35 LINKdotNET AS number
6713 490 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 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 166 666 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 3425 3807 194 bellsouth.net, inc.
7029 3374 986 159 Windstream Communications Inc
4766 2510 11113 1013 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
1785 1897 680 131 PaeTec Communications, Inc.
17974 1866 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1854 332 184 TVCABLE BOGOTA
28573 1828 1131 56 NET Servicos de Comunicao S.A
7545 1680 301 87 TPG Internet Pty Ltd
20115 1640 1566 619 Charter Communications

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 3374 3215 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1866 1793 PT TELEKOMUNIKASI INDONESIA
28573 1828 1772 NET Servicos de Comunicao S.A
1785 1897 1766 PaeTec Communications, Inc.
10620 1854 1670 TVCABLE BOGOTA
8402 1625 1609 Corbina telecom
7545 1680 1593 TPG Internet Pty Ltd
4766 2510 1497 Korea Telecom (KIX)
22773 1592 1477 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
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
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 /10:28 /11:82 /12:235
/13:460 /14:831 /15:1493 /16:12235 /17:6241 /18:10577
/19:20659 /20:29238 /21:30165 /22:40423 /23:38118 /24:212318
/25:1174 /26:1418 /27:777 /28:161 /29:64 /30:14
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3031 3374 Windstream Communications Inc
6389 2143 3425 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1707 1854 TVCABLE BOGOTA
8402 1603 1625 Corbina telecom
30036 1368 1424 Mediacom Communications Corp
6503 1284 1527 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1108 1307 TEDATA
7011 1068 1183 Citizens Utilities

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

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

1:537 2:577 4:14 6:3 8:407 12:1995
13:1 14:611 15:12 16:3 17:5 20:23
23:159 24:1762 27:1291 31:950 32:57 33:2
34:2 36:8 37:432 38:803 40:120 41:3093
42:136 44:3 46:1417 47:3 49:415 50:548
52:13 54:10 55:10 56:3 57:32 58:958
59:488 60:254 61:1207 62:985 63:2045 64:4162
65:2255 66:4477 67:2034 68:1163 69:3169 70:904
71:486 72:1828 74:2586 75:492 76:317 77:945
78:985 79:490 80:1217 81:909 82:666 83:547
84:485 85:1217 86:430 87:915 88:333 89:1690
90:291 91:4780 92:523 93:1492 94:1507 95:892
96:369 97:316 98:859 99:37 100:7 101:186
103:1045 106:103 107:191 108:280 109:1324 110:763
111:919 112:408 113:610 114:629 115:815 116:925
117:715 118:907 119:1232 120:353 121:691 122:1672
123:1105 124:1382 125:1247 128:560 129:194 130:253
131:622 132:179 133:22 134:245 135:62 136:214
137:175 138:356 139:183 140:493 141:243 142:410
143:429 144:518 145:70 146:501 147:284 148:770
149:306 150:157 151:180 152:466 153:171 154:12
155:400 156:217 157:336 158:178 159:544 160:338
161:260 162:347 163:191 164:585 165:385 166:573
167:467 168:823 169:128 170:859 171:128 172:2
173:1756 174:585 175:432 176:631 177:723 178:1358
180:1212 181:82 182:964 183:292 184:480 185:1
186:2253 187:1073 188:1248 189:1777 190:5541 192:6014
193:5293 194:3969 195:3412 196:1278 197:131 198:3652
199:4583 200:5854 201:1927 202:8574 203:8605 204:4335
205:2510 206:2743 207:2793 208:4041 209:3610 210:2735
211:1481 212:1999 213:1942 214:860 215:103 216:5106
217:1543 218:542 219:319 220:1233 221:557 222:322
223:337

End of report
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