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, April 1, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 02 Apr, 2013

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

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

BGP routing table entries examined: 448424
Prefixes after maximum aggregation: 183705
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 221058
Total ASes present in the Internet Routing Table: 43690
Prefixes per ASN: 10.26
Origin-only ASes present in the Internet Routing Table: 34385
Origin ASes announcing only one prefix: 16041
Transit ASes present in the Internet Routing Table: 5788
Transit-only ASes present in the Internet Routing Table: 139
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 29
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 373
Unregistered ASNs in the Routing Table: 136
Number of 32-bit ASNs allocated by the RIRs: 4663
Number of 32-bit ASNs visible in the Routing Table: 3517
Prefixes from 32-bit ASNs in the Routing Table: 10234
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 206
Number of addresses announced to Internet: 2626009708
Equivalent to 156 /8s, 133 /16s and 186 /24s
Percentage of available address space announced: 70.9
Percentage of allocated address space announced: 70.9
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.4
Total number of prefixes smaller than registry allocations: 158530

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

Prefixes being announced by APNIC Region ASes: 107870
Total APNIC prefixes after maximum aggregation: 33292
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 109050
Unique aggregates announced from the APNIC address blocks: 44310
APNIC Region origin ASes present in the Internet Routing Table: 4822
APNIC Prefixes per ASN: 22.62
APNIC Region origin ASes announcing only one prefix: 1228
APNIC Region transit ASes present in the Internet Routing Table: 812
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 475
Number of APNIC addresses announced to Internet: 719522016
Equivalent to 42 /8s, 227 /16s and 8 /24s
Percentage of available APNIC address space announced: 84.1

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: 157350
Total ARIN prefixes after maximum aggregation: 79334
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 158038
Unique aggregates announced from the ARIN address blocks: 72255
ARIN Region origin ASes present in the Internet Routing Table: 15583
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5919
ARIN Region transit ASes present in the Internet Routing Table: 1612
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 18
Number of ARIN addresses announced to Internet: 1079900544
Equivalent to 64 /8s, 93 /16s and 249 /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: 115284
Total RIPE prefixes after maximum aggregation: 59213
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 118999
Unique aggregates announced from the RIPE address blocks: 76705
RIPE Region origin ASes present in the Internet Routing Table: 17111
RIPE Prefixes per ASN: 6.95
RIPE Region origin ASes announcing only one prefix: 8147
RIPE Region transit ASes present in the Internet Routing Table: 2802
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2263
Number of RIPE addresses announced to Internet: 654750436
Equivalent to 39 /8s, 6 /16s and 178 /24s
Percentage of available RIPE address space announced: 95.2

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: 47609
Total LACNIC prefixes after maximum aggregation: 9375
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 51590
Unique aggregates announced from the LACNIC address blocks: 23879
LACNIC Region origin ASes present in the Internet Routing Table: 1883
LACNIC Prefixes per ASN: 27.40
LACNIC Region origin ASes announcing only one prefix: 560
LACNIC Region transit ASes present in the Internet Routing Table: 349
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 754
Number of LACNIC addresses announced to Internet: 125292072
Equivalent to 7 /8s, 119 /16s and 206 /24s
Percentage of available LACNIC address space announced: 74.7

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: 9939
Total AfriNIC prefixes after maximum aggregation: 2443
AfriNIC Deaggregation factor: 4.07
Prefixes being announced from the AfriNIC address blocks: 10541
Unique aggregates announced from the AfriNIC address blocks: 3718
AfriNIC Region origin ASes present in the Internet Routing Table: 607
AfriNIC Prefixes per ASN: 17.37
AfriNIC Region origin ASes announcing only one prefix: 187
AfriNIC Region transit ASes present in the Internet Routing Table: 131
Average AfriNIC Region AS path length visible: 4.8
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 7
Number of AfriNIC addresses announced to Internet: 46191872
Equivalent to 2 /8s, 192 /16s and 213 /24s
Percentage of available AfriNIC address space announced: 45.9

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 2950 11558 922 Korea Telecom (KIX)
17974 2515 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1850 301 90 TPG Internet Pty Ltd
4755 1730 392 198 TATA Communications formerly
9829 1485 1189 43 BSNL National Internet Backbo
9583 1281 97 530 Sify Limited
7552 1171 1066 12 Vietel Corporation
4808 1122 2109 326 CNCGROUP IP network: China169
9498 1061 310 73 BHARTI Airtel Ltd.
24560 1056 385 169 Bharti Airtel Ltd., Telemedia

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 3031 3694 87 bellsouth.net, inc.
7029 2184 1266 213 Windstream Communications Inc
18566 2069 382 184 Covad Communications
22773 2007 2929 125 Cox Communications, Inc.
1785 1972 677 125 PaeTec Communications, Inc.
20115 1669 1610 613 Charter Communications
4323 1605 1138 396 Time Warner Telecom
30036 1323 291 666 Mediacom Communications Corp
7018 1308 10805 849 AT&T WorldNet Services
11492 1215 223 328 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 1932 544 16 Corbina telecom
34984 1128 234 207 BILISIM TELEKOM
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
12479 844 786 66 Uni2 Autonomous System
13188 837 99 33 Educational Network
20940 803 278 638 Akamai Technologies European
31148 786 41 19 FreeNet ISP
8551 717 370 43 Bezeq International
6830 715 2314 436 UPC Distribution Services
58113 666 74 386 LIR DATACENTER TELECOM SRL

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
28573 2486 1346 92 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7303 1673 1152 210 Telecom Argentina Stet-France
8151 1351 2666 403 UniNet S.A. de C.V.
6503 1186 435 68 AVANTEL, S.A.
14754 940 127 87 Telgua S. A.
18881 841 716 18 Global Village Telecom
27947 803 87 94 Telconet S.A
11830 725 364 14 Instituto Costarricense de El
3816 692 306 85 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
36998 1137 80 4 MOBITEL
24863 671 274 33 LINKdotNET AS number
6713 536 615 23 Itissalat Al-MAGHRIB
8452 353 958 13 TEDATA
24835 275 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 188 698 88 MTN Network Solutions
33776 182 12 19 Starcomms Nigeria 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 3031 3694 87 bellsouth.net, inc.
4766 2950 11558 922 Korea Telecom (KIX)
17974 2515 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2486 1346 92 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7029 2184 1266 213 Windstream Communications Inc
18566 2069 382 184 Covad Communications
22773 2007 2929 125 Cox Communications, Inc.
1785 1972 677 125 PaeTec Communications, Inc.
8402 1932 544 16 Corbina telecom

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
17974 2515 2429 PT TELEKOMUNIKASI INDONESIA
28573 2486 2394 NET Servicos de Comunicao S.A
10620 2360 2124 TVCABLE BOGOTA
4766 2950 2028 Korea Telecom (KIX)
7029 2184 1971 Windstream Communications Inc
8402 1932 1916 Corbina telecom
18566 2069 1885 Covad Communications
22773 2007 1882 Cox Communications, Inc.
1785 1972 1847 PaeTec Communications, Inc.
7545 1850 1760 TPG Internet Pty Ltd

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
30031 UNALLOCATED 12.27.122.0/24 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 12.45.103.0/24 209 Qwest
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks
26064 UNALLOCATED 12.149.37.0/24 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
128.0.0.0/24 2876 Jump Management SRL
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.96.0/21 12886 LEWTelNet GmbH
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 mywire Datentechnik GmbH

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
41.222.80.0/21 37110 Moztel LDA
62.12.96.0/19 38478 SunnyVision Limited
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.

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 /8:17 /9:13 /10:29 /11:88 /12:248
/13:483 /14:876 /15:1558 /16:12660 /17:6614 /18:10876
/19:21743 /20:31869 /21:33630 /22:46276 /23:41561 /24:235564
/25:1396 /26:1779 /27:863 /28:179 /29:65 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2020 2069 Covad Communications
6389 1741 3031 bellsouth.net, inc.
8402 1629 1932 Corbina telecom
7029 1598 2184 Windstream Communications Inc
22773 1313 2007 Cox Communications, Inc.
30036 1203 1323 Mediacom Communications Corp
11492 1177 1215 Cable One
36998 1131 1137 MOBITEL
1785 1043 1972 PaeTec Communications, Inc.
7011 931 1175 Citizens Utilities

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

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

1:742 2:795 3:3 4:13 5:836 6:4
8:514 12:1920 13:3 14:765 15:11 16:3
17:8 20:19 23:248 24:1801 27:1439 31:1188
32:44 33:2 34:5 36:43 37:1696 38:863
39:2 40:164 41:2631 42:183 44:6 46:1772
47:2 49:622 50:672 52:12 54:28 55:9
57:27 58:1105 59:589 60:304 61:1443 62:976
63:2039 64:4290 65:2180 66:4283 67:2062 68:1115
69:3274 70:873 71:526 72:1897 74:2553 75:402
76:288 77:1084 78:1021 79:573 80:1255 81:974
82:629 83:579 84:559 85:1157 86:469 87:948
88:520 89:1792 90:262 91:5447 92:618 93:1681
94:1864 95:1564 96:498 97:340 98:1050 99:41
100:29 101:310 103:2350 105:488 106:134 107:207
108:514 109:1799 110:877 111:1042 112:501 113:766
114:689 115:1015 116:866 117:798 118:1004 119:1268
120:382 121:812 122:1738 123:1188 124:1328 125:1316
128:634 129:224 130:331 131:655 132:331 133:145
134:258 135:62 136:215 137:245 138:343 139:184
140:198 141:314 142:543 143:367 144:484 145:90
146:523 147:362 148:696 149:360 150:164 151:555
152:415 153:194 154:34 155:383 156:260 157:390
158:271 159:711 160:334 161:423 162:375 163:202
164:576 165:452 166:359 167:575 168:1016 169:133
170:1021 171:172 172:4 173:1581 174:582 175:437
176:1177 177:1899 178:2015 179:2 180:1388 181:298
182:1128 183:362 184:662 185:328 186:2399 187:1240
188:1908 189:1406 190:6634 192:6465 193:5670 194:4519
195:3459 196:1306 197:774 198:4284 199:5277 200:6051
201:2363 202:8877 203:8776 204:4491 205:2550 206:2789
207:2830 208:4062 209:3543 210:2920 211:1566 212:1999
213:1943 214:935 215:94 216:5195 217:1579 218:606
219:339 220:1269 221:544 222:320 223:500

End of report
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