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, June 17, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 18 Jun, 2012

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

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

BGP routing table entries examined: 414432
Prefixes after maximum aggregation: 175169
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 201879
Total ASes present in the Internet Routing Table: 41316
Prefixes per ASN: 10.03
Origin-only ASes present in the Internet Routing Table: 33304
Origin ASes announcing only one prefix: 15661
Transit ASes present in the Internet Routing Table: 5524
Transit-only ASes present in the Internet Routing Table: 142
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 28
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 415
Unregistered ASNs in the Routing Table: 140
Number of 32-bit ASNs allocated by the RIRs: 2854
Number of 32-bit ASNs visible in the Routing Table: 2488
Prefixes from 32-bit ASNs in the Routing Table: 6334
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 328
Number of addresses announced to Internet: 2566402860
Equivalent to 152 /8s, 248 /16s and 51 /24s
Percentage of available address space announced: 69.2
Percentage of allocated address space announced: 69.3
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.9
Total number of prefixes smaller than registry allocations: 144231

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

Prefixes being announced by APNIC Region ASes: 100767
Total APNIC prefixes after maximum aggregation: 32636
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101179
Unique aggregates announced from the APNIC address blocks: 41799
APNIC Region origin ASes present in the Internet Routing Table: 4708
APNIC Prefixes per ASN: 21.49
APNIC Region origin ASes announcing only one prefix: 1246
APNIC Region transit ASes present in the Internet Routing Table: 746
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: 229
Number of APNIC addresses announced to Internet: 703067264
Equivalent to 41 /8s, 231 /16s and 244 /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: 151992
Total ARIN prefixes after maximum aggregation: 77194
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 152964
Unique aggregates announced from the ARIN address blocks: 68116
ARIN Region origin ASes present in the Internet Routing Table: 15167
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 5749
ARIN Region transit ASes present in the Internet Routing Table: 1602
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: 1080982912
Equivalent to 64 /8s, 110 /16s and 125 /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: 103635
Total RIPE prefixes after maximum aggregation: 54778
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 105538
Unique aggregates announced from the RIPE address blocks: 66531
RIPE Region origin ASes present in the Internet Routing Table: 16622
RIPE Prefixes per ASN: 6.35
RIPE Region origin ASes announcing only one prefix: 8063
RIPE Region transit ASes present in the Internet Routing Table: 2658
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: 1645
Number of RIPE addresses announced to Internet: 630777732
Equivalent to 37 /8s, 152 /16s and 231 /24s
Percentage of available RIPE address space announced: 91.7

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
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: 42205
Total LACNIC prefixes after maximum aggregation: 8337
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 44670
Unique aggregates announced from the LACNIC address blocks: 21870
LACNIC Region origin ASes present in the Internet Routing Table: 1605
LACNIC Prefixes per ASN: 27.83
LACNIC Region origin ASes announcing only one prefix: 435
LACNIC Region transit ASes present in the Internet Routing Table: 306
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 593
Number of LACNIC addresses announced to Internet: 110629800
Equivalent to 6 /8s, 152 /16s and 19 /24s
Percentage of available LACNIC address space announced: 65.9

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: 9310
Total AfriNIC prefixes after maximum aggregation: 2160
AfriNIC Deaggregation factor: 4.31
Prefixes being announced from the AfriNIC address blocks: 9753
Unique aggregates announced from the AfriNIC address blocks: 3265
AfriNIC Region origin ASes present in the Internet Routing Table: 548
AfriNIC Prefixes per ASN: 17.80
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 119
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: 40472832
Equivalent to 2 /8s, 105 /16s and 145 /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 2672 11116 1158 Korea Telecom (KIX)
17974 1929 531 82 PT TELEKOMUNIKASI INDONESIA
7545 1684 301 86 TPG Internet Pty Ltd
4755 1593 386 155 TATA Communications formerly
9829 1297 1085 28 BSNL National Internet Backbo
9583 1183 89 509 Sify Limited
4808 1103 2049 314 CNCGROUP IP network: China169
7552 1102 1062 11 Vietel Corporation
24560 1031 385 163 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 3405 3791 191 bellsouth.net, inc.
7029 3298 986 159 Windstream Communications Inc
18566 2091 382 181 Covad Communications
1785 1920 681 132 PaeTec Communications, Inc.
22773 1649 2911 121 Cox Communications, Inc.
20115 1643 1570 613 Charter Communications
4323 1574 1043 385 Time Warner Telecom
30036 1439 267 746 Mediacom Communications Corp
7018 1227 10014 825 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 1805 544 16 Corbina telecom
2118 1239 97 14 EUnet/RELCOM Autonomous Syste
12479 745 713 90 Uni2 Autonomous System
34984 708 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
20940 676 222 528 Akamai Technologies European
6830 661 2219 427 UPC Distribution Services
8551 574 364 61 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 474 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 1967 342 205 TVCABLE BOGOTA
28573 1936 1188 52 NET Servicos de Comunicao S.A
6503 1526 418 65 AVANTEL, S.A.
8151 1488 3068 336 UniNet S.A. de C.V.
7303 1440 901 195 Telecom Argentina Stet-France
26615 900 696 35 Tim Brasil S.A.
27947 704 73 93 Telconet S.A
11172 645 91 73 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 1254 958 13 TEDATA
24863 854 274 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 3405 3791 191 bellsouth.net, inc.
7029 3298 986 159 Windstream Communications Inc
4766 2672 11116 1158 Korea Telecom (KIX)
18566 2091 382 181 Covad Communications
10620 1967 342 205 TVCABLE BOGOTA
28573 1936 1188 52 NET Servicos de Comunicao S.A
17974 1929 531 82 PT TELEKOMUNIKASI INDONESIA
1785 1920 681 132 PaeTec Communications, Inc.
8402 1805 544 16 Corbina telecom
7545 1684 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 3298 3139 Windstream Communications Inc
18566 2091 1910 Covad Communications
28573 1936 1884 NET Servicos de Comunicao S.A
17974 1929 1847 PT TELEKOMUNIKASI INDONESIA
8402 1805 1789 Corbina telecom
1785 1920 1788 PaeTec Communications, Inc.
10620 1967 1762 TVCABLE BOGOTA
7545 1684 1598 TPG Internet Pty Ltd
22773 1649 1528 Cox Communications, Inc.
4766 2672 1514 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
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
41.188.64.0/18 29544 Mauritanian Telecommunication

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 /14:834 /15:1508 /16:12305 /17:6314 /18:10707
/19:20794 /20:29551 /21:31210 /22:40856 /23:38671 /24:217043
/25:1233 /26:1442 /27:849 /28:169 /29:65 /30:18
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2679 3298 Windstream Communications Inc
18566 2040 2091 Covad Communications
6389 1876 3405 bellsouth.net, inc.
8402 1499 1805 Corbina telecom
30036 1379 1439 Mediacom Communications Corp
11492 1152 1189 Cable One
22773 1081 1649 Cox Communications, Inc.
6503 1061 1526 AVANTEL, S.A.
1785 1033 1920 PaeTec Communications, Inc.
8452 1023 1254 TEDATA

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

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

1:558 2:772 3:1 4:13 5:60 6:3
8:426 12:2016 13:1 14:621 15:12 16:3
17:5 20:25 23:184 24:1777 27:1311 31:989
32:56 33:2 34:2 36:9 37:723 38:812
40:127 41:3116 42:136 44:3 46:1421 47:2
49:396 50:562 52:13 54:12 55:10 56:1
57:34 58:963 59:497 60:260 61:1213 62:1003
63:2040 64:4236 65:2250 66:4445 67:2005 68:1158
69:3173 70:978 71:509 72:1824 74:2599 75:478
76:329 77:945 78:979 79:492 80:1220 81:946
82:657 83:542 84:504 85:1190 86:424 87:928
88:338 89:1723 90:293 91:4937 92:570 93:1432
94:1589 95:1230 96:369 97:316 98:894 99:38
100:17 101:247 103:1178 106:103 107:186 108:335
109:1374 110:777 111:924 112:419 113:616 114:637
115:849 116:948 117:732 118:919 119:1230 120:349
121:694 122:1671 123:1098 124:1396 125:1254 128:564
129:199 130:250 131:633 132:282 133:22 134:244
135:61 136:214 137:239 138:333 139:191 140:494
141:253 142:417 143:373 144:534 145:73 146:511
147:292 148:769 149:314 150:164 151:181 152:472
153:174 154:16 155:446 156:223 157:381 158:188
159:627 160:350 161:268 162:352 163:190 164:640
165:414 166:588 167:473 168:913 169:127 170:883
171:138 172:4 173:1781 174:600 175:429 176:544
177:814 178:1452 180:1265 181:97 182:1018 183:223
184:535 185:1 186:2343 187:1125 188:1348 189:1843
190:5661 192:6009 193:5531 194:4541 195:3401 196:1221
197:156 198:3667 199:4789 200:5903 201:1963 202:8651
203:8551 204:4350 205:2542 206:2810 207:2802 208:4036
209:3607 210:2775 211:1548 212:2029 213:1931 214:869
215:88 216:5102 217:1575 218:553 219:313 220:1245
221:570 222:317 223:362

End of report
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