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.

Monday, May 21, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 409840
Prefixes after maximum aggregation: 174021
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 199903
Total ASes present in the Internet Routing Table: 41048
Prefixes per ASN: 9.98
Origin-only ASes present in the Internet Routing Table: 33205
Origin ASes announcing only one prefix: 15649
Transit ASes present in the Internet Routing Table: 5483
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 40
Max AS path prepend of ASN (22394) 35
Prefixes from unregistered ASNs in the Routing Table: 375
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 2727
Number of 32-bit ASNs visible in the Routing Table: 2360
Prefixes from 32-bit ASNs in the Routing Table: 5975
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 107
Number of addresses announced to Internet: 2551927280
Equivalent to 152 /8s, 27 /16s and 81 /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: 175095

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

Prefixes being announced by APNIC Region ASes: 100209
Total APNIC prefixes after maximum aggregation: 32461
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96659
Unique aggregates announced from the APNIC address blocks: 39925
APNIC Region origin ASes present in the Internet Routing Table: 4684
APNIC Prefixes per ASN: 20.64
APNIC Region origin ASes announcing only one prefix: 1238
APNIC Region transit ASes present in the Internet Routing Table: 729
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: 215
Number of APNIC addresses announced to Internet: 646019520
Equivalent to 38 /8s, 129 /16s and 121 /24s
Percentage of available APNIC address space announced: 81.9

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: 151270
Total ARIN prefixes after maximum aggregation: 76680
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121834
Unique aggregates announced from the ARIN address blocks: 51068
ARIN Region origin ASes present in the Internet Routing Table: 15120
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5748
ARIN Region transit ASes present in the Internet Routing Table: 1603
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 16
Number of ARIN addresses announced to Internet: 812302272
Equivalent to 48 /8s, 106 /16s and 191 /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: 101257
Total RIPE prefixes after maximum aggregation: 54365
RIPE Deaggregation factor: 1.86
Prefixes being announced from the RIPE address blocks: 93359
Unique aggregates announced from the RIPE address blocks: 59126
RIPE Region origin ASes present in the Internet Routing Table: 16575
RIPE Prefixes per ASN: 5.63
RIPE Region origin ASes announcing only one prefix: 8059
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: 1569
Number of RIPE addresses announced to Internet: 513647496
Equivalent to 30 /8s, 157 /16s and 163 /24s
Percentage of available RIPE address space announced: 82.7

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: 41608
Total LACNIC prefixes after maximum aggregation: 8288
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 41644
Unique aggregates announced from the LACNIC address blocks: 20435
LACNIC Region origin ASes present in the Internet Routing Table: 1596
LACNIC Prefixes per ASN: 26.09
LACNIC Region origin ASes announcing only one prefix: 438
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: 555
Number of LACNIC addresses announced to Internet: 101172552
Equivalent to 6 /8s, 7 /16s and 197 /24s
Percentage of available LACNIC address space announced: 67.0

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: 9334
Total AfriNIC prefixes after maximum aggregation: 2163
AfriNIC Deaggregation factor: 4.32
Prefixes being announced from the AfriNIC address blocks: 7390
Unique aggregates announced from the AfriNIC address blocks: 2210
AfriNIC Region origin ASes present in the Internet Routing Table: 539
AfriNIC Prefixes per ASN: 13.71
AfriNIC Region origin ASes announcing only one prefix: 166
AfriNIC Region transit ASes present in the Internet Routing Table: 117
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: 31792384
Equivalent to 1 /8s, 229 /16s and 29 /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 2633 11114 1120 Korea Telecom (KIX)
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1679 301 86 TPG Internet Pty Ltd
4755 1577 385 155 TATA Communications formerly
9829 1295 1085 28 BSNL National Internet Backbo
7552 1174 1062 11 Vietel Corporation
9583 1160 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 3413 3806 192 bellsouth.net, inc.
7029 3363 985 158 Windstream Communications Inc
18566 2095 382 178 Covad Communications
1785 1906 681 131 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1608 2911 121 Cox Communications, Inc.
4323 1583 1042 382 Time Warner Telecom
30036 1417 263 754 Mediacom Communications Corp
7018 1226 10031 823 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 1742 544 16 Corbina telecom
34984 696 188 172 BILISIM TELEKOM
31148 683 37 9 FreeNet ISP
12479 680 671 67 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 567 360 80 Bezeq International
3320 486 8442 402 Deutsche Telekom AG
3292 472 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 1902 337 202 TVCABLE BOGOTA
28573 1867 1153 56 NET Servicos de Comunicao S.A
6503 1527 418 65 AVANTEL, S.A.
8151 1481 3029 340 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 578 244 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 1336 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
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 3413 3806 192 bellsouth.net, inc.
7029 3363 985 158 Windstream Communications Inc
4766 2633 11114 1120 Korea Telecom (KIX)
18566 2095 382 178 Covad Communications
17974 1924 530 80 PT TELEKOMUNIKASI INDONESIA
1785 1906 681 131 PaeTec Communications, Inc.
10620 1902 337 202 TVCABLE BOGOTA
28573 1867 1153 56 NET Servicos de Comunicao S.A
8402 1742 544 16 Corbina telecom
7545 1679 301 86 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 3363 3205 Windstream Communications Inc
18566 2095 1917 Covad Communications
17974 1924 1844 PT TELEKOMUNIKASI INDONESIA
28573 1867 1811 NET Servicos de Comunicao S.A
1785 1906 1775 PaeTec Communications, Inc.
8402 1742 1726 Corbina telecom
10620 1902 1700 TVCABLE BOGOTA
7545 1679 1593 TPG Internet Pty Ltd
4766 2633 1513 Korea Telecom (KIX)
22773 1608 1487 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.
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 /10:29 /11:81 /12:235
/13:463 /14:832 /15:1500 /16:12260 /17:6277 /18:10600
/19:20733 /20:29429 /21:30746 /22:40367 /23:38391 /24:214088
/25:1230 /26:1454 /27:818 /28:169 /29:68 /30:17
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 3020 3363 Windstream Communications Inc
6389 2132 3413 bellsouth.net, inc.
18566 2044 2095 Covad Communications
10620 1726 1902 TVCABLE BOGOTA
8402 1720 1742 Corbina telecom
30036 1358 1417 Mediacom Communications Corp
6503 1285 1527 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1138 1336 TEDATA
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 2:754 4:13 5:34 6:3 8:415
12:2003 13:1 14:613 15:12 16:3 17:5
20:23 23:170 24:1772 27:1305 31:1026 32:57
33:2 34:2 36:8 37:478 38:809 40:124
41:3202 42:132 44:3 46:1424 47:3 49:405
50:548 52:13 54:11 55:9 56:3 57:34
58:959 59:483 60:252 61:1228 62:997 63:2044
64:4176 65:2236 66:4486 67:2011 68:1162 69:3195
70:905 71:489 72:1823 74:2594 75:492 76:327
77:951 78:983 79:490 80:1209 81:926 82:662
83:543 84:487 85:1220 86:429 87:906 88:333
89:1706 90:289 91:4837 92:542 93:1325 94:1518
95:1173 96:367 97:313 98:888 99:38 100:7
101:190 103:1087 106:104 107:185 108:297 109:1336
110:766 111:912 112:409 113:601 114:623 115:836
116:934 117:720 118:907 119:1215 120:355 121:698
122:1658 123:1102 124:1385 125:1254 128:562 129:195
130:249 131:631 132:178 133:22 134:249 135:62
136:214 137:242 138:358 139:184 140:494 141:243
142:414 143:557 144:538 145:70 146:504 147:291
148:770 149:297 150:195 151:177 152:469 153:172
154:12 155:401 156:223 157:382 158:182 159:553
160:340 161:267 162:347 163:190 164:604 165:399
166:571 167:468 168:863 169:126 170:874 171:131
172:4 173:1753 174:587 175:429 176:528 177:758
178:1380 180:1218 181:85 182:995 183:291 184:496
185:1 186:2306 187:1080 188:1274 189:1808 190:5530
192:5997 193:5440 194:4181 195:3214 196:1211 197:145
198:3657 199:4633 200:5881 201:1926 202:8537 203:8590
204:4339 205:2555 206:2773 207:2800 208:4057 209:3625
210:2764 211:1525 212:2032 213:1944 214:853 215:103
216:5102 217:1538 218:550 219:314 220:1236 221:555
222:325 223:353

End of report
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