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.

Tuesday, May 22, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 23 May, 2012

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

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

BGP routing table entries examined: 410379
Prefixes after maximum aggregation: 174228
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 199981
Total ASes present in the Internet Routing Table: 41059
Prefixes per ASN: 9.99
Origin-only ASes present in the Internet Routing Table: 33218
Origin ASes announcing only one prefix: 15653
Transit ASes present in the Internet Routing Table: 5482
Transit-only ASes present in the Internet Routing Table: 135
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: 378
Unregistered ASNs in the Routing Table: 134
Number of 32-bit ASNs allocated by the RIRs: 2729
Number of 32-bit ASNs visible in the Routing Table: 2359
Prefixes from 32-bit ASNs in the Routing Table: 5986
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 110
Number of addresses announced to Internet: 2552451696
Equivalent to 152 /8s, 35 /16s and 82 /24s
Percentage of available address space announced: 68.9
Percentage of allocated address space announced: 68.9
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.7
Total number of prefixes smaller than registry allocations: 175331

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

Prefixes being announced by APNIC Region ASes: 100402
Total APNIC prefixes after maximum aggregation: 32508
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96857
Unique aggregates announced from the APNIC address blocks: 39983
APNIC Region origin ASes present in the Internet Routing Table: 4690
APNIC Prefixes per ASN: 20.65
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 732
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 22
Number of APNIC region 32-bit ASNs visible in the Routing Table: 216
Number of APNIC addresses announced to Internet: 646356032
Equivalent to 38 /8s, 134 /16s and 156 /24s
Percentage of available APNIC address space announced: 82.0

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: 151488
Total ARIN prefixes after maximum aggregation: 76819
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121883
Unique aggregates announced from the ARIN address blocks: 51032
ARIN Region origin ASes present in the Internet Routing Table: 15127
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5754
ARIN Region transit ASes present in the Internet Routing Table: 1599
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: 812290496
Equivalent to 48 /8s, 106 /16s and 145 /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: 101326
Total RIPE prefixes after maximum aggregation: 54384
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 93418
Unique aggregates announced from the RIPE address blocks: 59155
RIPE Region origin ASes present in the Internet Routing Table: 16574
RIPE Prefixes per ASN: 5.64
RIPE Region origin ASes announcing only one prefix: 8051
RIPE Region transit ASes present in the Internet Routing Table: 2645
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: 1570
Number of RIPE addresses announced to Internet: 513678472
Equivalent to 30 /8s, 158 /16s and 28 /24s
Percentage of available RIPE address space announced: 82.8

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
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: 41668
Total LACNIC prefixes after maximum aggregation: 8286
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 41709
Unique aggregates announced from the LACNIC address blocks: 20435
LACNIC Region origin ASes present in the Internet Routing Table: 1596
LACNIC Prefixes per ASN: 26.13
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 306
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: 552
Number of LACNIC addresses announced to Internet: 101302344
Equivalent to 6 /8s, 9 /16s and 192 /24s
Percentage of available LACNIC address space announced: 67.1

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,
200/8, 201/8,

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

Prefixes being announced by AfriNIC Region ASes: 9319
Total AfriNIC prefixes after maximum aggregation: 2167
AfriNIC Deaggregation factor: 4.30
Prefixes being announced from the AfriNIC address blocks: 7371
Unique aggregates announced from the AfriNIC address blocks: 2204
AfriNIC Region origin ASes present in the Internet Routing Table: 542
AfriNIC Prefixes per ASN: 13.60
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 118
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: 31826944
Equivalent to 1 /8s, 229 /16s and 164 /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 2634 11114 1120 Korea Telecom (KIX)
17974 1921 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1685 301 87 TPG Internet Pty Ltd
4755 1578 386 155 TATA Communications formerly
9829 1295 1085 28 BSNL National Internet Backbo
7552 1175 1062 11 Vietel Corporation
9583 1159 87 499 Sify Limited
4808 1100 2050 316 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 964 291 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 3412 3807 192 bellsouth.net, inc.
7029 3332 986 159 Windstream Communications Inc
18566 2095 382 178 Covad Communications
1785 1905 681 131 PaeTec Communications, Inc.
20115 1635 1565 619 Charter Communications
22773 1607 2911 121 Cox Communications, Inc.
4323 1565 1040 377 Time Warner Telecom
30036 1417 262 755 Mediacom Communications Corp
7018 1225 10031 822 AT&T WorldNet Services
7011 1187 317 681 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 1729 544 16 Corbina telecom
34984 697 188 172 BILISIM TELEKOM
31148 684 37 9 FreeNet ISP
12479 681 672 66 Uni2 Autonomous System
2118 658 97 14 EUnet/RELCOM Autonomous Syste
6830 655 2215 426 UPC Distribution Services
20940 654 216 510 Akamai Technologies European
8551 568 360 80 Bezeq International
3320 486 8442 402 Deutsche Telekom AG
3292 470 2107 406 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 1902 337 202 TVCABLE BOGOTA
28573 1877 1170 57 NET Servicos de Comunicao S.A
6503 1528 418 66 AVANTEL, S.A.
8151 1483 3037 337 UniNet S.A. de C.V.
7303 1435 901 191 Telecom Argentina Stet-France
26615 902 760 32 Tim Brasil S.A.
27947 690 73 95 Telconet S.A
11172 642 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 579 244 99 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 1362 957 12 TEDATA
24863 845 274 35 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
16637 171 666 83 MTN Network Solutions
15706 164 32 6 Sudatel Internet Exchange Aut
36923 157 20 4 Swift Networks Limited

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 3412 3807 192 bellsouth.net, inc.
7029 3332 986 159 Windstream Communications Inc
4766 2634 11114 1120 Korea Telecom (KIX)
18566 2095 382 178 Covad Communications
17974 1921 530 80 PT TELEKOMUNIKASI INDONESIA
1785 1905 681 131 PaeTec Communications, Inc.
10620 1902 337 202 TVCABLE BOGOTA
28573 1877 1170 57 NET Servicos de Comunicao S.A
8402 1729 544 16 Corbina telecom
7545 1685 301 87 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 3332 3173 Windstream Communications Inc
18566 2095 1917 Covad Communications
17974 1921 1841 PT TELEKOMUNIKASI INDONESIA
28573 1877 1820 NET Servicos de Comunicao S.A
1785 1905 1774 PaeTec Communications, Inc.
8402 1729 1713 Corbina telecom
10620 1902 1700 TVCABLE BOGOTA
7545 1685 1598 TPG Internet Pty Ltd
4766 2634 1514 Korea Telecom (KIX)
22773 1607 1486 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
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
5.43.128.0/19 48642 K Telecom Ltd.
5.43.240.0/21 21191 SeverTransTeleCom Autonomous
5.44.0.0/20 39812 CJSC Radiotelephone AS
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

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
/13:463 /14:832 /15:1501 /16:12287 /17:6316 /18:10618
/19:20759 /20:29456 /21:30800 /22:40389 /23:38406 /24:214393
/25:1232 /26:1458 /27:817 /28:169 /29:68 /30:17
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2991 3332 Windstream Communications Inc
6389 2132 3412 bellsouth.net, inc.
18566 2044 2095 Covad Communications
10620 1726 1902 TVCABLE BOGOTA
8402 1707 1729 Corbina telecom
30036 1358 1417 Mediacom Communications Corp
6503 1285 1528 AVANTEL, S.A.
8452 1164 1362 TEDATA
11492 1149 1186 Cable One
7011 1072 1187 Citizens Utilities

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

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

1:546 2:751 4:13 5:34 6:3 8:415
12:2005 13:1 14:614 15:12 16:3 17:5
20:23 23:170 24:1772 27:1310 31:1026 32:57
33:2 34:2 36:8 37:482 38:809 40:124
41:3210 42:137 44:3 46:1422 47:3 49:408
50:549 52:13 54:11 55:9 56:3 57:33
58:958 59:484 60:253 61:1218 62:998 63:2038
64:4222 65:2255 66:4476 67:2007 68:1161 69:3191
70:934 71:495 72:1823 74:2598 75:491 76:325
77:951 78:983 79:490 80:1213 81:929 82:661
83:543 84:485 85:1221 86:431 87:906 88:331
89:1712 90:289 91:4842 92:548 93:1336 94:1513
95:1170 96:368 97:313 98:874 99:38 100:7
101:191 103:1095 106:104 107:185 108:301 109:1339
110:767 111:907 112:409 113:602 114:623 115:836
116:934 117:721 118:907 119:1233 120:355 121:699
122:1661 123:1102 124:1383 125:1255 128:555 129:195
130:249 131:630 132:285 133:22 134:249 135:62
136:214 137:241 138:359 139:182 140:493 141:243
142:414 143:563 144:539 145:70 146:505 147:296
148:772 149:297 150:194 151:177 152:469 153:172
154:12 155:401 156:223 157:382 158:186 159:556
160:340 161:267 162:345 163:190 164:604 165:399
166:570 167:468 168:863 169:126 170:874 171:131
172:4 173:1751 174:590 175:431 176:523 177:763
178:1381 180:1217 181:85 182:1003 183:298 184:496
185:1 186:2309 187:1084 188:1275 189:1807 190:5537
192:6002 193:5440 194:4182 195:3220 196:1212 197:146
198:3661 199:4636 200:5857 201:1924 202:8578 203:8614
204:4335 205:2543 206:2765 207:2802 208:4060 209:3616
210:2765 211:1525 212:2032 213:1941 214:850 215:103
216:5100 217:1538 218:549 219:314 220:1238 221:554
222:321 223:353

End of report
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