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, April 25, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 26 Apr, 2012

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

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

BGP routing table entries examined: 406815
Prefixes after maximum aggregation: 173043
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 197941
Total ASes present in the Internet Routing Table: 40816
Prefixes per ASN: 9.97
Origin-only ASes present in the Internet Routing Table: 33107
Origin ASes announcing only one prefix: 15614
Transit ASes present in the Internet Routing Table: 5454
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: 395
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 2623
Number of 32-bit ASNs visible in the Routing Table: 2255
Prefixes from 32-bit ASNs in the Routing Table: 5643
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 114
Number of addresses announced to Internet: 2539095376
Equivalent to 151 /8s, 87 /16s and 133 /24s
Percentage of available address space announced: 68.5
Percentage of allocated address space announced: 68.6
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.4
Total number of prefixes smaller than registry allocations: 173595

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

Prefixes being announced by APNIC Region ASes: 99283
Total APNIC prefixes after maximum aggregation: 32272
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 95768
Unique aggregates announced from the APNIC address blocks: 39868
APNIC Region origin ASes present in the Internet Routing Table: 4686
APNIC Prefixes per ASN: 20.44
APNIC Region origin ASes announcing only one prefix: 1236
APNIC Region transit ASes present in the Internet Routing Table: 734
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: 190
Number of APNIC addresses announced to Internet: 643971168
Equivalent to 38 /8s, 98 /16s and 56 /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: 150233
Total ARIN prefixes after maximum aggregation: 76449
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121343
Unique aggregates announced from the ARIN address blocks: 50379
ARIN Region origin ASes present in the Internet Routing Table: 15057
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5729
ARIN Region transit ASes present in the Internet Routing Table: 1585
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 29
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 807307456
Equivalent to 48 /8s, 30 /16s and 136 /24s
Percentage of available ARIN address space announced: 64.4

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: 101814
Total RIPE prefixes after maximum aggregation: 53814
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93715
Unique aggregates announced from the RIPE address blocks: 58351
RIPE Region origin ASes present in the Internet Routing Table: 16516
RIPE Prefixes per ASN: 5.67
RIPE Region origin ASes announcing only one prefix: 8043
RIPE Region transit ASes present in the Internet Routing Table: 2627
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: 1516
Number of RIPE addresses announced to Internet: 510745608
Equivalent to 30 /8s, 113 /16s and 92 /24s
Percentage of available RIPE address space announced: 82.3

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: 40697
Total LACNIC prefixes after maximum aggregation: 8310
LACNIC Deaggregation factor: 4.90
Prefixes being announced from the LACNIC address blocks: 40544
Unique aggregates announced from the LACNIC address blocks: 20237
LACNIC Region origin ASes present in the Internet Routing Table: 1589
LACNIC Prefixes per ASN: 25.52
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 299
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: 527
Number of LACNIC addresses announced to Internet: 99263368
Equivalent to 5 /8s, 234 /16s and 163 /24s
Percentage of available LACNIC address space announced: 65.7

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: 8970
Total AfriNIC prefixes after maximum aggregation: 2130
AfriNIC Deaggregation factor: 4.21
Prefixes being announced from the AfriNIC address blocks: 7035
Unique aggregates announced from the AfriNIC address blocks: 2197
AfriNIC Region origin ASes present in the Internet Routing Table: 535
AfriNIC Prefixes per ASN: 13.15
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 115
Average AfriNIC Region AS path length visible: 4.4
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: 31783168
Equivalent to 1 /8s, 228 /16s and 249 /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 2498 11112 1012 Korea Telecom (KIX)
17974 1821 509 71 PT TELEKOMUNIKASI INDONESIA
7545 1676 301 88 TPG Internet Pty Ltd
4755 1574 385 158 TATA Communications formerly
9829 1249 1069 30 BSNL National Internet Backbo
7552 1169 1062 11 Vietel Corporation
9583 1145 84 490 Sify Limited
4808 1106 2050 319 CNCGROUP IP network: China169
24560 1026 385 167 Bharti Airtel Ltd., Telemedia
9498 950 291 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 3426 3807 199 bellsouth.net, inc.
7029 3365 986 158 Windstream Communications Inc
18566 2091 382 179 Covad Communications
1785 1904 680 130 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1604 1044 383 Time Warner Telecom
22773 1579 2910 113 Cox Communications, Inc.
30036 1414 258 764 Mediacom Communications Corp
7018 1260 9775 820 AT&T WorldNet Services
7011 1184 317 682 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 1754 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
34984 681 188 174 BILISIM TELEKOM
31148 680 37 9 FreeNet ISP
6830 655 2215 426 UPC Distribution Services
12479 646 666 62 Uni2 Autonomous System
20940 639 206 496 Akamai Technologies European
8551 572 360 80 Bezeq International
3320 531 8441 397 Deutsche Telekom AG
2578 501 33 7 Demos, Moscow, Russia

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 1832 329 171 TVCABLE BOGOTA
28573 1747 1101 105 NET Servicos de Comunicao S.A
6503 1533 418 65 AVANTEL, S.A.
8151 1476 3000 342 UniNet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 902 697 32 Tim Brasil S.A.
27947 684 74 98 Telconet S.A
11172 639 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 572 242 100 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 1304 958 13 TEDATA
24863 841 274 35 LINKdotNET AS number
6713 492 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 197 12 21 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
16637 174 666 83 MTN Network Solutions
15706 169 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 3426 3807 199 bellsouth.net, inc.
7029 3365 986 158 Windstream Communications Inc
4766 2498 11112 1012 Korea Telecom (KIX)
18566 2091 382 179 Covad Communications
1785 1904 680 130 PaeTec Communications, Inc.
10620 1832 329 171 TVCABLE BOGOTA
17974 1821 509 71 PT TELEKOMUNIKASI INDONESIA
8402 1754 544 16 Corbina telecom
28573 1747 1101 105 NET Servicos de Comunicao S.A
7545 1676 301 88 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 3365 3207 Windstream Communications Inc
18566 2091 1912 Covad Communications
1785 1904 1774 PaeTec Communications, Inc.
17974 1821 1750 PT TELEKOMUNIKASI INDONESIA
8402 1754 1738 Corbina telecom
10620 1832 1661 TVCABLE BOGOTA
28573 1747 1642 NET Servicos de Comunicao S.A
7545 1676 1588 TPG Internet Pty Ltd
4766 2498 1486 Korea Telecom (KIX)
6503 1533 1468 AVANTEL, S.A.

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
5.1.0.0/19 21219 Datacom Autonomous System
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

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
/13:460 /14:830 /15:1488 /16:12239 /17:6250 /18:10545
/19:20624 /20:28983 /21:29995 /22:40571 /23:37927 /24:212852
/25:1200 /26:1432 /27:784 /28:159 /29:65 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3023 3365 Windstream Communications Inc
6389 2144 3426 bellsouth.net, inc.
18566 2040 2091 Covad Communications
8402 1732 1754 Corbina telecom
10620 1709 1832 TVCABLE BOGOTA
30036 1360 1414 Mediacom Communications Corp
6503 1291 1533 AVANTEL, S.A.
11492 1140 1177 Cable One
8452 1104 1304 TEDATA
1785 1071 1904 PaeTec Communications, Inc.

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

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

1:539 2:761 4:14 6:3 8:405 12:2011
13:1 14:609 15:12 16:3 17:7 20:23
23:168 24:1767 27:1272 31:953 32:57 33:1
34:2 36:8 37:415 38:801 40:120 41:3146
42:134 44:3 46:1481 47:3 49:404 50:535
52:13 54:8 55:12 56:3 57:31 58:961
59:494 60:253 61:1195 62:983 63:1993 64:4171
65:2253 66:4487 67:2018 68:1166 69:3189 70:902
71:484 72:1823 74:2599 75:492 76:319 77:944
78:1008 79:488 80:1210 81:903 82:668 83:551
84:482 85:1211 86:413 87:926 88:343 89:1642
90:291 91:4758 92:521 93:1372 94:1507 95:1164
96:358 97:315 98:908 99:37 100:7 101:171
103:1028 106:102 107:191 108:235 109:1298 110:759
111:921 112:457 113:579 114:631 115:802 116:908
117:723 118:908 119:1231 120:354 121:691 122:1670
123:1092 124:1366 125:1238 128:546 129:194 130:255
131:624 132:180 133:22 134:244 135:62 136:214
137:177 138:355 139:148 140:492 141:243 142:402
143:399 144:521 145:74 146:500 147:279 148:766
149:306 150:159 151:176 152:465 153:171 154:9
155:399 156:215 157:380 158:178 159:527 160:337
161:264 162:348 163:191 164:580 165:399 166:573
167:468 168:820 169:128 170:859 171:127 172:2
173:1755 174:574 175:435 176:438 177:657 178:1327
180:1171 181:81 182:820 183:289 184:458 185:1
186:2235 187:1042 188:1215 189:1786 190:5529 192:6011
193:5538 194:4653 195:3594 196:1286 197:132 198:3658
199:4539 200:5794 201:1920 202:8520 203:8597 204:4326
205:2499 206:2748 207:2797 208:4058 209:3625 210:2737
211:1478 212:2009 213:1924 214:853 215:104 216:5128
217:1540 218:544 219:316 220:1229 221:557 222:323
223:335

End of report
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