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, June 13, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 14 Jun, 2012

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

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

BGP routing table entries examined: 413352
Prefixes after maximum aggregation: 175017
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 201533
Total ASes present in the Internet Routing Table: 41283
Prefixes per ASN: 10.01
Origin-only ASes present in the Internet Routing Table: 33281
Origin ASes announcing only one prefix: 15658
Transit ASes present in the Internet Routing Table: 5528
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: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 411
Unregistered ASNs in the Routing Table: 139
Number of 32-bit ASNs allocated by the RIRs: 2830
Number of 32-bit ASNs visible in the Routing Table: 2474
Prefixes from 32-bit ASNs in the Routing Table: 6268
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 189
Number of addresses announced to Internet: 2563108012
Equivalent to 152 /8s, 197 /16s and 236 /24s
Percentage of available address space announced: 69.2
Percentage of allocated address space announced: 69.2
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 143876

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

Prefixes being announced by APNIC Region ASes: 100604
Total APNIC prefixes after maximum aggregation: 32582
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101007
Unique aggregates announced from the APNIC address blocks: 41748
APNIC Region origin ASes present in the Internet Routing Table: 4706
APNIC Prefixes per ASN: 21.46
APNIC Region origin ASes announcing only one prefix: 1250
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: 226
Number of APNIC addresses announced to Internet: 702388864
Equivalent to 41 /8s, 221 /16s and 154 /24s
Percentage of available APNIC address space announced: 82.1

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: 151749
Total ARIN prefixes after maximum aggregation: 77175
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 152686
Unique aggregates announced from the ARIN address blocks: 67978
ARIN Region origin ASes present in the Internet Routing Table: 15151
ARIN Prefixes per ASN: 10.08
ARIN Region origin ASes announcing only one prefix: 5742
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: 17
Number of ARIN addresses announced to Internet: 1079126656
Equivalent to 64 /8s, 82 /16s and 42 /24s
Percentage of available ARIN address space announced: 57.1

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: 103289
Total RIPE prefixes after maximum aggregation: 54720
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 105318
Unique aggregates announced from the RIPE address blocks: 66613
RIPE Region origin ASes present in the Internet Routing Table: 16622
RIPE Prefixes per ASN: 6.34
RIPE Region origin ASes announcing only one prefix: 8062
RIPE Region transit ASes present in the Internet Routing Table: 2664
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: 1633
Number of RIPE addresses announced to Internet: 630765060
Equivalent to 37 /8s, 152 /16s and 182 /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: 41988
Total LACNIC prefixes after maximum aggregation: 8317
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 44436
Unique aggregates announced from the LACNIC address blocks: 21819
LACNIC Region origin ASes present in the Internet Routing Table: 1605
LACNIC Prefixes per ASN: 27.69
LACNIC Region origin ASes announcing only one prefix: 436
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: 110548136
Equivalent to 6 /8s, 150 /16s and 212 /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: 9267
Total AfriNIC prefixes after maximum aggregation: 2159
AfriNIC Deaggregation factor: 4.29
Prefixes being announced from the AfriNIC address blocks: 9716
Unique aggregates announced from the AfriNIC address blocks: 3239
AfriNIC Region origin ASes present in the Internet Routing Table: 547
AfriNIC Prefixes per ASN: 17.76
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 39813120
Equivalent to 2 /8s, 95 /16s and 128 /24s
Percentage of available AfriNIC address space announced: 39.6

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 2660 11115 1150 Korea Telecom (KIX)
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
7545 1680 301 84 TPG Internet Pty Ltd
4755 1593 386 155 TATA Communications formerly
9829 1300 1085 28 BSNL National Internet Backbo
9583 1175 87 502 Sify Limited
7552 1158 1062 11 Vietel Corporation
4808 1105 2050 315 CNCGROUP IP network: China169
24560 1031 385 163 Bharti Airtel Ltd., Telemedia
9498 965 291 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 3408 3791 192 bellsouth.net, inc.
7029 3289 986 159 Windstream Communications Inc
18566 2091 382 181 Covad Communications
1785 1919 681 131 PaeTec Communications, Inc.
22773 1647 2911 121 Cox Communications, Inc.
20115 1643 1570 613 Charter Communications
4323 1574 1043 385 Time Warner Telecom
30036 1428 265 755 Mediacom Communications Corp
7018 1224 10013 823 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 1752 544 16 Corbina telecom
2118 1226 97 14 EUnet/RELCOM Autonomous Syste
12479 733 710 87 Uni2 Autonomous System
34984 709 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
20940 660 219 514 Akamai Technologies European
6830 658 2217 427 UPC Distribution Services
8551 575 364 61 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 475 2108 408 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 1873 1185 49 NET Servicos de Comunicao S.A
6503 1527 418 65 AVANTEL, S.A.
8151 1487 3068 338 UniNet S.A. de C.V.
7303 1439 901 194 Telecom Argentina Stet-France
26615 902 760 31 Tim Brasil S.A.
27947 705 73 93 Telconet S.A
11172 646 91 74 Servicios Alestra S.A de C.V
3816 586 247 89 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 1255 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 170 664 87 MTN Network Solutions
29571 157 15 16 Ci Telecom Autonomous system
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 3408 3791 192 bellsouth.net, inc.
7029 3289 986 159 Windstream Communications Inc
4766 2660 11115 1150 Korea Telecom (KIX)
18566 2091 382 181 Covad Communications
10620 1967 342 205 TVCABLE BOGOTA
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
1785 1919 681 131 PaeTec Communications, Inc.
28573 1873 1185 49 NET Servicos de Comunicao S.A
8402 1752 544 16 Corbina telecom
7545 1680 301 84 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 3289 3130 Windstream Communications Inc
18566 2091 1910 Covad Communications
17974 1928 1847 PT TELEKOMUNIKASI INDONESIA
28573 1873 1824 NET Servicos de Comunicao S.A
1785 1919 1788 PaeTec Communications, Inc.
10620 1967 1762 TVCABLE BOGOTA
8402 1752 1736 Corbina telecom
7545 1680 1596 TPG Internet Pty Ltd
22773 1647 1526 Cox Communications, Inc.
4766 2660 1510 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
5.63.64.0/18 9198 Kazakhtelecom Data Network Ad
5.63.160.0/21 49800 GNC-ALFA CJSC
5.76.0.0/16 9198 Kazakhtelecom Data Network Ad
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 /9:13 /10:28 /11:82 /12:236
/13:462 /14:832 /15:1505 /16:12314 /17:6319 /18:10667
/19:20802 /20:29562 /21:31120 /22:40770 /23:38575 /24:216253
/25:1235 /26:1441 /27:839 /28:170 /29:68 /30:18
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 2670 3289 Windstream Communications Inc
18566 2040 2091 Covad Communications
6389 1878 3408 bellsouth.net, inc.
8402 1447 1752 Corbina telecom
30036 1368 1428 Mediacom Communications Corp
11492 1152 1189 Cable One
22773 1079 1647 Cox Communications, Inc.
6503 1061 1527 AVANTEL, S.A.
1785 1032 1919 PaeTec Communications, Inc.
8452 1025 1255 TEDATA

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

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

1:554 2:757 3:1 4:13 5:50 6:3
8:424 12:2017 13:1 14:618 15:12 16:3
17:5 20:23 23:179 24:1778 27:1309 31:982
32:56 33:2 34:2 36:9 37:709 38:810
40:127 41:3113 42:135 44:3 46:1423 47:2
49:396 50:561 52:13 54:12 55:10 56:1
57:34 58:959 59:497 60:259 61:1206 62:1008
63:2010 64:4233 65:2252 66:4450 67:2008 68:1160
69:3173 70:950 71:508 72:1824 74:2594 75:474
76:328 77:954 78:965 79:491 80:1219 81:943
82:664 83:543 84:505 85:1185 86:422 87:921
88:337 89:1722 90:293 91:4923 92:564 93:1391
94:1598 95:1215 96:368 97:315 98:906 99:38
100:7 101:246 103:1147 106:103 107:186 108:332
109:1379 110:776 111:925 112:418 113:607 114:630
115:835 116:942 117:723 118:899 119:1230 120:358
121:686 122:1655 123:1102 124:1393 125:1253 128:563
129:199 130:249 131:633 132:289 133:22 134:244
135:61 136:215 137:240 138:358 139:192 140:495
141:251 142:412 143:374 144:532 145:72 146:511
147:293 148:771 149:313 150:162 151:176 152:472
153:174 154:14 155:446 156:222 157:381 158:188
159:578 160:349 161:268 162:353 163:190 164:638
165:408 166:588 167:473 168:862 169:127 170:874
171:136 172:4 173:1779 174:604 175:424 176:538
177:804 178:1382 180:1248 181:96 182:1018 183:229
184:532 185:1 186:2330 187:1107 188:1354 189:1836
190:5602 192:6001 193:5525 194:4539 195:3392 196:1221
197:151 198:3666 199:4773 200:5893 201:1956 202:8656
203:8534 204:4340 205:2536 206:2779 207:2802 208:4008
209:3613 210:2775 211:1549 212:2035 213:1930 214:874
215:90 216:5104 217:1549 218:552 219:313 220:1237
221:571 222:316 223:363

End of report
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