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 6, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 07 May, 2012

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

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

BGP routing table entries examined: 406926
Prefixes after maximum aggregation: 173253
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 198527
Total ASes present in the Internet Routing Table: 40876
Prefixes per ASN: 9.96
Origin-only ASes present in the Internet Routing Table: 33120
Origin ASes announcing only one prefix: 15620
Transit ASes present in the Internet Routing Table: 5472
Transit-only ASes present in the Internet Routing Table: 140
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: 401
Unregistered ASNs in the Routing Table: 131
Number of 32-bit ASNs allocated by the RIRs: 2669
Number of 32-bit ASNs visible in the Routing Table: 2284
Prefixes from 32-bit ASNs in the Routing Table: 5731
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2544218736
Equivalent to 151 /8s, 165 /16s and 178 /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: 173959

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

Prefixes being announced by APNIC Region ASes: 99638
Total APNIC prefixes after maximum aggregation: 32280
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96087
Unique aggregates announced from the APNIC address blocks: 39782
APNIC Region origin ASes present in the Internet Routing Table: 4678
APNIC Prefixes per ASN: 20.54
APNIC Region origin ASes announcing only one prefix: 1234
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: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 196
Number of APNIC addresses announced to Internet: 644320096
Equivalent to 38 /8s, 103 /16s and 139 /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: 150457
Total ARIN prefixes after maximum aggregation: 76487
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121479
Unique aggregates announced from the ARIN address blocks: 50693
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: 1590
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: 810141632
Equivalent to 48 /8s, 73 /16s and 199 /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: 100700
Total RIPE prefixes after maximum aggregation: 54006
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 92616
Unique aggregates announced from the RIPE address blocks: 58488
RIPE Region origin ASes present in the Internet Routing Table: 16542
RIPE Prefixes per ASN: 5.60
RIPE Region origin ASes announcing only one prefix: 8049
RIPE Region transit ASes present in the Internet Routing Table: 2639
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: 1537
Number of RIPE addresses announced to Internet: 511867720
Equivalent to 30 /8s, 130 /16s and 123 /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: 41289
Total LACNIC prefixes after maximum aggregation: 8273
LACNIC Deaggregation factor: 4.99
Prefixes being announced from the LACNIC address blocks: 41204
Unique aggregates announced from the LACNIC address blocks: 20358
LACNIC Region origin ASes present in the Internet Routing Table: 1593
LACNIC Prefixes per ASN: 25.87
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: 529
Number of LACNIC addresses announced to Internet: 100028808
Equivalent to 5 /8s, 246 /16s and 81 /24s
Percentage of available LACNIC address space announced: 66.2

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: 8938
Total AfriNIC prefixes after maximum aggregation: 2141
AfriNIC Deaggregation factor: 4.17
Prefixes being announced from the AfriNIC address blocks: 6978
Unique aggregates announced from the AfriNIC address blocks: 2228
AfriNIC Region origin ASes present in the Internet Routing Table: 532
AfriNIC Prefixes per ASN: 13.12
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 124
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: 31793152
Equivalent to 1 /8s, 229 /16s and 32 /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 2506 11113 1012 Korea Telecom (KIX)
17974 1866 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1678 301 86 TPG Internet Pty Ltd
4755 1574 385 155 TATA Communications formerly
9829 1281 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 1010 385 167 Bharti Airtel Ltd., Telemedia
18101 946 131 155 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
6389 3425 3807 194 bellsouth.net, inc.
7029 3373 986 159 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1896 680 130 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 1247 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 1631 544 16 Corbina telecom
34984 687 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
12479 672 669 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 1855 332 181 TVCABLE BOGOTA
28573 1820 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 903 745 34 Tim Brasil S.A.
27947 685 74 98 Telconet S.A
11172 643 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 1310 958 13 TEDATA
24863 844 274 35 LINKdotNET AS number
6713 475 649 18 Itissalat Al-MAGHRIB
3741 263 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 186 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
15706 169 32 6 Sudatel Internet Exchange Aut
16637 158 666 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 3373 986 159 Windstream Communications Inc
4766 2506 11113 1012 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
1785 1896 680 130 PaeTec Communications, Inc.
17974 1866 510 73 PT TELEKOMUNIKASI INDONESIA
10620 1855 332 181 TVCABLE BOGOTA
28573 1820 1131 56 NET Servicos de Comunicao S.A
7545 1678 301 86 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 3373 3214 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1866 1793 PT TELEKOMUNIKASI INDONESIA
1785 1896 1766 PaeTec Communications, Inc.
28573 1820 1764 NET Servicos de Comunicao S.A
10620 1855 1674 TVCABLE BOGOTA
8402 1631 1615 Corbina telecom
7545 1678 1592 TPG Internet Pty Ltd
4766 2506 1494 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
27.54.144.0/24 45774 Chandra Net Pvt. Limited, Ind
27.54.151.0/24 45774 Chandra Net Pvt. Limited, Ind

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 /15:1491 /16:12231 /17:6243 /18:10572
/19:20635 /20:29219 /21:30131 /22:40645 /23:38112 /24:212311
/25:1192 /26:1430 /27:781 /28:163 /29:67 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3030 3373 Windstream Communications Inc
6389 2143 3425 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1710 1855 TVCABLE BOGOTA
8402 1609 1631 Corbina telecom
30036 1368 1424 Mediacom Communications Corp
6503 1284 1527 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1111 1310 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)
----------------------------------------------

1:537 2:564 4:14 6:3 8:407 12:1995
13:1 14:599 15:12 16:3 17:5 20:23
23:164 24:1762 27:1287 31:948 32:57 33:2
34:2 36:8 37:430 38:803 40:120 41:3080
42:136 44:3 46:1413 47:3 49:414 50:548
52:13 54:10 55:10 56:3 57:31 58:958
59:487 60:254 61:1207 62:986 63:2049 64:4166
65:2253 66:4478 67:2032 68:1163 69:3174 70:905
71:485 72:1830 74:2607 75:494 76:316 77:943
78:985 79:489 80:1214 81:909 82:659 83:547
84:481 85:1214 86:417 87:919 88:339 89:1673
90:291 91:4783 92:523 93:1490 94:1503 95:891
96:369 97:316 98:863 99:37 100:7 101:185
103:1036 106:101 107:191 108:279 109:1321 110:754
111:918 112:444 113:607 114:629 115:815 116:928
117:722 118:905 119:1229 120:350 121:690 122:1672
123:1103 124:1381 125:1235 128:560 129:194 130:252
131:620 132:179 133:22 134:245 135:62 136:215
137:175 138:356 139:183 140:493 141:243 142:410
143:429 144:515 145:70 146:496 147:281 148:771
149:306 150:157 151:180 152:464 153:169 154:12
155:401 156:217 157:377 158:177 159:544 160:339
161:260 162:347 163:191 164:585 165:397 166:573
167:467 168:823 169:128 170:860 171:128 172:2
173:1764 174:577 175:431 176:650 177:717 178:1356
180:1212 181:82 182:950 183:292 184:477 185:1
186:2267 187:1069 188:1248 189:1777 190:5573 192:6013
193:5295 194:3972 195:3408 196:1272 197:134 198:3656
199:4589 200:5833 201:1934 202:8550 203:8613 204:4336
205:2505 206:2752 207:2797 208:4045 209:3617 210:2732
211:1479 212:1999 213:1942 214:850 215:103 216:5103
217:1542 218:543 219:319 220:1232 221:557 222:323
223:337

End of report
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