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.

Thursday, June 21, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 22 Jun, 2012

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

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

BGP routing table entries examined: 414646
Prefixes after maximum aggregation: 175340
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 202182
Total ASes present in the Internet Routing Table: 41340
Prefixes per ASN: 10.03
Origin-only ASes present in the Internet Routing Table: 33303
Origin ASes announcing only one prefix: 15660
Transit ASes present in the Internet Routing Table: 5532
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: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 433
Unregistered ASNs in the Routing Table: 145
Number of 32-bit ASNs allocated by the RIRs: 2873
Number of 32-bit ASNs visible in the Routing Table: 2505
Prefixes from 32-bit ASNs in the Routing Table: 6388
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 330
Number of addresses announced to Internet: 2567860012
Equivalent to 153 /8s, 14 /16s and 111 /24s
Percentage of available address space announced: 69.3
Percentage of allocated address space announced: 69.4
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.0
Total number of prefixes smaller than registry allocations: 144329

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

Prefixes being announced by APNIC Region ASes: 100877
Total APNIC prefixes after maximum aggregation: 32665
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101311
Unique aggregates announced from the APNIC address blocks: 41875
APNIC Region origin ASes present in the Internet Routing Table: 4707
APNIC Prefixes per ASN: 21.52
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 744
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 236
Number of APNIC addresses announced to Internet: 703412864
Equivalent to 41 /8s, 237 /16s and 58 /24s
Percentage of available APNIC address space announced: 82.2

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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, 150/8, 153/8,
163/8, 171/8, 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: 152107
Total ARIN prefixes after maximum aggregation: 77270
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153054
Unique aggregates announced from the ARIN address blocks: 68179
ARIN Region origin ASes present in the Internet Routing Table: 15171
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 5751
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: 1080892032
Equivalent to 64 /8s, 109 /16s and 26 /24s
Percentage of available ARIN address space announced: 57.2

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, 128/8,
129/8, 130/8, 131/8, 132/8, 134/8, 135/8, 136/8,
137/8, 138/8, 139/8, 140/8, 142/8, 143/8, 144/8,
146/8, 147/8, 148/8, 149/8, 152/8, 155/8, 156/8,
157/8, 158/8, 159/8, 160/8, 161/8, 162/8, 164/8,
165/8, 166/8, 167/8, 168/8, 169/8, 170/8, 172/8,
173/8, 174/8, 184/8, 192/8, 198/8, 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: 103551
Total RIPE prefixes after maximum aggregation: 54833
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 105500
Unique aggregates announced from the RIPE address blocks: 66647
RIPE Region origin ASes present in the Internet Routing Table: 16637
RIPE Prefixes per ASN: 6.34
RIPE Region origin ASes announcing only one prefix: 8071
RIPE Region transit ASes present in the Internet Routing Table: 2668
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: 1652
Number of RIPE addresses announced to Internet: 631504516
Equivalent to 37 /8s, 163 /16s and 254 /24s
Percentage of available RIPE address space announced: 91.8

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
59392-61439, 196608-199679
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,
141/8, 145/8, 151/8, 176/8, 178/8, 185/8, 188/8,
193/8, 194/8, 195/8, 212/8, 213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 42164
Total LACNIC prefixes after maximum aggregation: 8328
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 44649
Unique aggregates announced from the LACNIC address blocks: 21881
LACNIC Region origin ASes present in the Internet Routing Table: 1599
LACNIC Prefixes per ASN: 27.92
LACNIC Region origin ASes announcing only one prefix: 432
LACNIC Region transit ASes present in the Internet Routing Table: 305
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: 596
Number of LACNIC addresses announced to Internet: 110824872
Equivalent to 6 /8s, 155 /16s and 13 /24s
Percentage of available LACNIC address space announced: 66.1

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,
191/8, 200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9358
Total AfriNIC prefixes after maximum aggregation: 2182
AfriNIC Deaggregation factor: 4.29
Prefixes being announced from the AfriNIC address blocks: 9802
Unique aggregates announced from the AfriNIC address blocks: 3299
AfriNIC Region origin ASes present in the Internet Routing Table: 547
AfriNIC Prefixes per ASN: 17.92
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 125
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: 40480256
Equivalent to 2 /8s, 105 /16s and 174 /24s
Percentage of available AfriNIC address space announced: 40.2

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 154/8, 196/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 2704 11117 1196 Korea Telecom (KIX)
17974 1941 531 82 PT TELEKOMUNIKASI INDONESIA
7545 1687 301 85 TPG Internet Pty Ltd
4755 1584 385 154 TATA Communications formerly
9829 1256 1083 26 BSNL National Internet Backbo
9583 1174 89 512 Sify Limited
4808 1107 2054 313 CNCGROUP IP network: China169
7552 1100 1062 11 Vietel Corporation
24560 1034 385 165 Bharti Airtel Ltd., Telemedia
9498 966 291 63 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 3402 3791 190 bellsouth.net, inc.
7029 3301 986 159 Windstream Communications Inc
18566 2090 382 180 Covad Communications
1785 1924 681 132 PaeTec Communications, Inc.
22773 1650 2911 121 Cox Communications, Inc.
20115 1645 1570 613 Charter Communications
4323 1570 1043 385 Time Warner Telecom
30036 1453 270 741 Mediacom Communications Corp
7018 1226 10014 824 AT&T WorldNet Services
11492 1189 216 356 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 1734 544 16 Corbina telecom
2118 1239 97 14 EUnet/RELCOM Autonomous Syste
12479 757 721 93 Uni2 Autonomous System
34984 710 188 173 BILISIM TELEKOM
31148 686 37 9 FreeNet ISP
6830 685 2234 437 UPC Distribution Services
20940 663 215 521 Akamai Technologies European
8551 575 364 61 Bezeq International
3320 490 8442 403 Deutsche Telekom AG
13188 482 100 10 Educational Network

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 1967 342 205 TVCABLE BOGOTA
28573 1934 1211 54 NET Servicos de Comunicao S.A
6503 1530 418 65 AVANTEL, S.A.
8151 1493 3068 336 UniNet S.A. de C.V.
7303 1440 901 195 Telecom Argentina Stet-France
26615 903 728 33 Tim Brasil S.A.
27947 705 73 93 Telconet S.A
11172 646 91 74 Servicios Alestra S.A de C.V
3816 584 245 92 Empresa Nacional de Telecomun
22047 583 326 15 VTR PUNTO NET 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 1276 958 13 TEDATA
24863 860 274 35 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 210 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
16637 172 664 87 MTN Network Solutions
29975 167 571 19 Vodacom
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 3402 3791 190 bellsouth.net, inc.
7029 3301 986 159 Windstream Communications Inc
4766 2704 11117 1196 Korea Telecom (KIX)
18566 2090 382 180 Covad Communications
10620 1967 342 205 TVCABLE BOGOTA
17974 1941 531 82 PT TELEKOMUNIKASI INDONESIA
28573 1934 1211 54 NET Servicos de Comunicao S.A
1785 1924 681 132 PaeTec Communications, Inc.
8402 1734 544 16 Corbina telecom
7545 1687 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 3301 3142 Windstream Communications Inc
18566 2090 1910 Covad Communications
28573 1934 1880 NET Servicos de Comunicao S.A
17974 1941 1859 PT TELEKOMUNIKASI INDONESIA
1785 1924 1792 PaeTec Communications, Inc.
10620 1967 1762 TVCABLE BOGOTA
8402 1734 1718 Corbina telecom
7545 1687 1602 TPG Internet Pty Ltd
22773 1650 1529 Cox Communications, Inc.
4766 2704 1508 Korea Telecom (KIX)

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
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
32873 UNALLOCATED 12.46.102.0/24 10912 InterNAP Network Ser
14764 UNALLOCATED 12.108.237.0/24 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
5.96.0.0/15 3269 TELECOM ITALIA
5.98.0.0/15 3269 TELECOM ITALIA
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

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 /9:13 /10:28 /11:83 /12:236
/13:462 /14:833 /15:1506 /16:12291 /17:6330 /18:10710
/19:20816 /20:29506 /21:31270 /22:40902 /23:38781 /24:217014
/25:1241 /26:1460 /27:866 /28:172 /29:66 /30:18
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2682 3301 Windstream Communications Inc
18566 2039 2090 Covad Communications
6389 1875 3402 bellsouth.net, inc.
8402 1431 1734 Corbina telecom
30036 1392 1453 Mediacom Communications Corp
11492 1152 1189 Cable One
22773 1082 1650 Cox Communications, Inc.
6503 1061 1530 AVANTEL, S.A.
8452 1041 1276 TEDATA
1785 1035 1924 PaeTec Communications, Inc.

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

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

1:563 2:745 3:1 4:13 5:62 6:3
8:427 12:2012 13:1 14:626 15:12 16:3
17:5 20:24 23:184 24:1782 27:1312 31:984
32:56 33:2 34:2 36:9 37:570 38:814
39:1 40:127 41:3153 42:139 44:3 46:1429
47:2 49:415 50:562 52:13 54:12 55:10
56:1 57:34 58:968 59:496 60:259 61:1226
62:998 63:2040 64:4248 65:2255 66:4482 67:2025
68:1156 69:3196 70:982 71:509 72:1830 74:2600
75:478 76:330 77:950 78:968 79:493 80:1217
81:945 82:656 83:525 84:499 85:1189 86:420
87:936 88:331 89:1722 90:298 91:4956 92:574
93:1409 94:1596 95:1228 96:370 97:317 98:871
99:38 100:17 101:244 103:1192 106:103 107:186
108:340 109:1387 110:785 111:923 112:417 113:625
114:642 115:819 116:946 117:726 118:900 119:1236
120:348 121:689 122:1673 123:1097 124:1399 125:1253
128:562 129:198 130:254 131:632 132:289 133:22
134:243 135:61 136:215 137:239 138:334 139:191
140:494 141:257 142:420 143:374 144:533 145:74
146:513 147:293 148:773 149:313 150:164 151:182
152:473 153:174 154:17 155:436 156:225 157:381
158:188 159:623 160:342 161:267 162:352 163:192
164:639 165:414 166:588 167:474 168:912 169:127
170:886 171:139 172:4 173:1788 174:604 175:436
176:546 177:814 178:1515 180:1254 181:98 182:1020
183:231 184:516 185:1 186:2363 187:1128 188:1347
189:1848 190:5631 192:6007 193:5535 194:4540 195:3411
196:1224 197:155 198:3671 199:4798 200:5852 201:1969
202:8615 203:8563 204:4343 205:2536 206:2809 207:2798
208:4040 209:3608 210:2789 211:1551 212:2023 213:1926
214:869 215:88 216:5105 217:1573 218:554 219:312
220:1241 221:573 222:315 223:352

End of report
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