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 13, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 14 May, 2012

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

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

BGP routing table entries examined: 407694
Prefixes after maximum aggregation: 173587
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 199132
Total ASes present in the Internet Routing Table: 40957
Prefixes per ASN: 9.95
Origin-only ASes present in the Internet Routing Table: 33151
Origin ASes announcing only one prefix: 15637
Transit ASes present in the Internet Routing Table: 5485
Transit-only ASes present in the Internet Routing Table: 139
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: 363
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 2692
Number of 32-bit ASNs visible in the Routing Table: 2321
Prefixes from 32-bit ASNs in the Routing Table: 5866
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 106
Number of addresses announced to Internet: 2548059308
Equivalent to 151 /8s, 224 /16s and 76 /24s
Percentage of available address space announced: 68.7
Percentage of allocated address space announced: 68.8
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: 174119

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

Prefixes being announced by APNIC Region ASes: 100245
Total APNIC prefixes after maximum aggregation: 32374
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 96687
Unique aggregates announced from the APNIC address blocks: 39846
APNIC Region origin ASes present in the Internet Routing Table: 4683
APNIC Prefixes per ASN: 20.65
APNIC Region origin ASes announcing only one prefix: 1236
APNIC Region transit ASes present in the Internet Routing Table: 726
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: 202
Number of APNIC addresses announced to Internet: 644645504
Equivalent to 38 /8s, 108 /16s and 130 /24s
Percentage of available APNIC address space announced: 81.8

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: 150779
Total ARIN prefixes after maximum aggregation: 76558
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121661
Unique aggregates announced from the ARIN address blocks: 50813
ARIN Region origin ASes present in the Internet Routing Table: 15097
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5739
ARIN Region transit ASes present in the Internet Routing Table: 1601
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: 16
Number of ARIN addresses announced to Internet: 812053696
Equivalent to 48 /8s, 102 /16s and 244 /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: 100194
Total RIPE prefixes after maximum aggregation: 54167
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92363
Unique aggregates announced from the RIPE address blocks: 58716
RIPE Region origin ASes present in the Internet Routing Table: 16552
RIPE Prefixes per ASN: 5.58
RIPE Region origin ASes announcing only one prefix: 8056
RIPE Region transit ASes present in the Internet Routing Table: 2648
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: 1553
Number of RIPE addresses announced to Internet: 512883524
Equivalent to 30 /8s, 145 /16s and 251 /24s
Percentage of available RIPE address space announced: 82.6

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: 41404
Total LACNIC prefixes after maximum aggregation: 8273
LACNIC Deaggregation factor: 5.00
Prefixes being announced from the LACNIC address blocks: 41402
Unique aggregates announced from the LACNIC address blocks: 20493
LACNIC Region origin ASes present in the Internet Routing Table: 1597
LACNIC Prefixes per ASN: 25.92
LACNIC Region origin ASes announcing only one prefix: 440
LACNIC Region transit ASes present in the Internet Routing Table: 297
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: 545
Number of LACNIC addresses announced to Internet: 100243848
Equivalent to 5 /8s, 249 /16s and 153 /24s
Percentage of available LACNIC address space announced: 66.4

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: 9028
Total AfriNIC prefixes after maximum aggregation: 2149
AfriNIC Deaggregation factor: 4.20
Prefixes being announced from the AfriNIC address blocks: 7065
Unique aggregates announced from the AfriNIC address blocks: 2218
AfriNIC Region origin ASes present in the Internet Routing Table: 531
AfriNIC Prefixes per ASN: 13.31
AfriNIC Region origin ASes announcing only one prefix: 166
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: 31799552
Equivalent to 1 /8s, 229 /16s and 57 /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 2554 11115 1047 Korea Telecom (KIX)
17974 1869 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1678 301 85 TPG Internet Pty Ltd
4755 1590 388 162 TATA Communications formerly
9829 1283 1069 30 BSNL National Internet Backbo
7552 1164 1062 11 Vietel Corporation
9583 1156 86 500 Sify Limited
4808 1114 2051 318 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 64 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 3414 3807 192 bellsouth.net, inc.
7029 3376 986 159 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1903 681 131 PaeTec Communications, Inc.
20115 1637 1566 620 Charter Communications
22773 1597 2911 115 Cox Communications, Inc.
4323 1575 1042 383 Time Warner Telecom
30036 1410 262 749 Mediacom Communications Corp
7018 1249 10038 818 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 1725 544 16 Corbina telecom
34984 693 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 679 671 69 Uni2 Autonomous System
20940 657 216 511 Akamai Technologies European
6830 656 2215 426 UPC Distribution Services
8551 573 360 80 Bezeq International
3320 485 8442 401 Deutsche Telekom AG
3292 473 2108 407 TDC Tele Danmark
8866 436 134 27 Bulgarian Telecommunication C

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 1869 334 175 TVCABLE BOGOTA
28573 1849 1137 58 NET Servicos de Comunicao S.A
6503 1524 418 67 AVANTEL, S.A.
8151 1476 3003 340 UniNet S.A. de C.V.
7303 1371 837 188 Telecom Argentina Stet-France
26615 903 761 33 Tim Brasil S.A.
27947 694 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 576 243 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 1308 958 13 TEDATA
24863 845 274 35 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
24835 179 80 8 RAYA Telecom - Egypt
16637 170 666 82 MTN Network Solutions
15706 165 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 3414 3807 192 bellsouth.net, inc.
7029 3376 986 159 Windstream Communications Inc
4766 2554 11115 1047 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
1785 1903 681 131 PaeTec Communications, Inc.
10620 1869 334 175 TVCABLE BOGOTA
17974 1869 510 73 PT TELEKOMUNIKASI INDONESIA
28573 1849 1137 58 NET Servicos de Comunicao S.A
8402 1725 544 16 Corbina telecom
7545 1678 301 85 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 3376 3217 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1869 1796 PT TELEKOMUNIKASI INDONESIA
28573 1849 1791 NET Servicos de Comunicao S.A
1785 1903 1772 PaeTec Communications, Inc.
8402 1725 1709 Corbina telecom
10620 1869 1694 TVCABLE BOGOTA
7545 1678 1593 TPG Internet Pty Ltd
4766 2554 1507 Korea Telecom (KIX)
22773 1597 1482 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 /10:29 /11:81 /12:235
/13:460 /14:831 /15:1496 /16:12243 /17:6255 /18:10582
/19:20705 /20:29338 /21:30425 /22:39992 /23:38281 /24:213033
/25:1196 /26:1430 /27:787 /28:161 /29:67 /30:16
/31:0 /32:20

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

ASN No of nets Total ann. Description
7029 3033 3376 Windstream Communications Inc
6389 2133 3414 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1715 1869 TVCABLE BOGOTA
8402 1703 1725 Corbina telecom
30036 1351 1410 Mediacom Communications Corp
6503 1281 1524 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1109 1308 TEDATA
7011 1069 1184 Citizens Utilities

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

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

1:543 2:690 4:14 5:3 6:3 8:412
12:1999 13:1 14:607 15:12 16:3 17:5
20:23 23:166 24:1770 27:1286 31:955 32:57
33:2 34:2 36:8 37:451 38:810 40:120
41:3126 42:136 44:3 46:1419 47:3 49:402
50:548 52:13 54:10 55:9 56:3 57:32
58:961 59:510 60:255 61:1295 62:986 63:2059
64:4174 65:2245 66:4466 67:2011 68:1165 69:3209
70:905 71:484 72:1821 74:2593 75:493 76:325
77:939 78:982 79:491 80:1215 81:895 82:667
83:553 84:487 85:1224 86:438 87:916 88:334
89:1696 90:290 91:4806 92:538 93:1444 94:1520
95:975 96:368 97:316 98:872 99:38 100:7
101:188 103:1057 106:103 107:187 108:284 109:1320
110:767 111:918 112:408 113:605 114:631 115:905
116:936 117:715 118:910 119:1234 120:353 121:801
122:1668 123:1104 124:1379 125:1250 128:560 129:197
130:250 131:627 132:178 133:22 134:247 135:62
136:213 137:178 138:334 139:183 140:493 141:243
142:415 143:434 144:519 145:70 146:496 147:284
148:770 149:306 150:155 151:176 152:466 153:172
154:12 155:400 156:221 157:381 158:183 159:546
160:337 161:260 162:347 163:190 164:586 165:386
166:572 167:468 168:858 169:126 170:861 171:131
172:2 173:1742 174:587 175:431 176:667 177:746
178:1361 180:1208 181:82 182:976 183:294 184:483
185:1 186:2286 187:1075 188:1270 189:1793 190:5580
192:6000 193:5295 194:3805 195:3213 196:1279 197:135
198:3643 199:4608 200:5850 201:1946 202:8553 203:8605
204:4336 205:2527 206:2762 207:2798 208:4078 209:3616
210:2753 211:1508 212:2025 213:1937 214:850 215:103
216:5095 217:1547 218:541 219:338 220:1232 221:558
222:322 223:339

End of report
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