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.

Saturday, March 30, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 31 Mar, 2013

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

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

BGP routing table entries examined: 447384
Prefixes after maximum aggregation: 183563
Deaggregation factor: 2.44
Unique aggregates announced to Internet: 220884
Total ASes present in the Internet Routing Table: 43659
Prefixes per ASN: 10.25
Origin-only ASes present in the Internet Routing Table: 34375
Origin ASes announcing only one prefix: 16032
Transit ASes present in the Internet Routing Table: 5775
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 385
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: 3509
Prefixes from 32-bit ASNs in the Routing Table: 10182
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 207
Number of addresses announced to Internet: 2624379756
Equivalent to 156 /8s, 108 /16s and 219 /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: 158196

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

Prefixes being announced by APNIC Region ASes: 107322
Total APNIC prefixes after maximum aggregation: 33198
APNIC Deaggregation factor: 3.23
Prefixes being announced from the APNIC address blocks: 108504
Unique aggregates announced from the APNIC address blocks: 44267
APNIC Region origin ASes present in the Internet Routing Table: 4815
APNIC Prefixes per ASN: 22.53
APNIC Region origin ASes announcing only one prefix: 1227
APNIC Region transit ASes present in the Internet Routing Table: 814
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: 720095968
Equivalent to 42 /8s, 235 /16s and 202 /24s
Percentage of available APNIC address space announced: 84.2

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: 157290
Total ARIN prefixes after maximum aggregation: 79299
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157987
Unique aggregates announced from the ARIN address blocks: 72226
ARIN Region origin ASes present in the Internet Routing Table: 15576
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5917
ARIN Region transit ASes present in the Internet Routing Table: 1611
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: 1079821440
Equivalent to 64 /8s, 92 /16s and 196 /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: 115000
Total RIPE prefixes after maximum aggregation: 59202
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 118674
Unique aggregates announced from the RIPE address blocks: 76641
RIPE Region origin ASes present in the Internet Routing Table: 17114
RIPE Prefixes per ASN: 6.93
RIPE Region origin ASes announcing only one prefix: 8146
RIPE Region transit ASes present in the Internet Routing Table: 2792
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2258
Number of RIPE addresses announced to Internet: 654764004
Equivalent to 39 /8s, 6 /16s and 231 /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: 47615
Total LACNIC prefixes after maximum aggregation: 9384
LACNIC Deaggregation factor: 5.07
Prefixes being announced from the LACNIC address blocks: 51576
Unique aggregates announced from the LACNIC address blocks: 23903
LACNIC Region origin ASes present in the Internet Routing Table: 1878
LACNIC Prefixes per ASN: 27.46
LACNIC Region origin ASes announcing only one prefix: 556
LACNIC Region transit ASes present in the Internet Routing Table: 345
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 752
Number of LACNIC addresses announced to Internet: 125291816
Equivalent to 7 /8s, 119 /16s and 205 /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: 9837
Total AfriNIC prefixes after maximum aggregation: 2432
AfriNIC Deaggregation factor: 4.04
Prefixes being announced from the AfriNIC address blocks: 10436
Unique aggregates announced from the AfriNIC address blocks: 3656
AfriNIC Region origin ASes present in the Internet Routing Table: 601
AfriNIC Prefixes per ASN: 17.36
AfriNIC Region origin ASes announcing only one prefix: 186
AfriNIC Region transit ASes present in the Internet Routing Table: 130
Average AfriNIC Region AS path length visible: 4.9
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 44053760
Equivalent to 2 /8s, 160 /16s and 53 /24s
Percentage of available AfriNIC address space announced: 43.8

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 2951 11558 922 Korea Telecom (KIX)
17974 2515 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1850 301 90 TPG Internet Pty Ltd
4755 1724 392 198 TATA Communications formerly
9829 1458 1189 43 BSNL National Internet Backbo
9583 1211 91 497 Sify Limited
7552 1171 1066 12 Vietel Corporation
4808 1124 2109 326 CNCGROUP IP network: China169
9498 1060 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 3032 3694 87 bellsouth.net, inc.
7029 2183 1266 213 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 2006 2929 125 Cox Communications, Inc.
1785 1973 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 1311 10805 851 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 1832 544 16 Corbina telecom
34984 1121 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 716 370 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 2490 1346 92 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7303 1673 1152 210 Telecom Argentina Stet-France
8151 1360 2674 402 UniNet S.A. de C.V.
6503 1185 435 67 AVANTEL, S.A.
14754 941 127 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 669 274 33 LINKdotNET AS number
6713 529 613 22 Itissalat Al-MAGHRIB
8452 347 446 12 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 187 698 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 3032 3694 87 bellsouth.net, inc.
4766 2951 11558 922 Korea Telecom (KIX)
17974 2515 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2490 1346 92 NET Servicos de Comunicao S.A
10620 2360 407 236 TVCABLE BOGOTA
7029 2183 1266 213 Windstream Communications Inc
18566 2070 382 185 Covad Communications
22773 2006 2929 125 Cox Communications, Inc.
1785 1973 677 125 PaeTec Communications, Inc.
7545 1850 301 90 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
17974 2515 2429 PT TELEKOMUNIKASI INDONESIA
28573 2490 2398 NET Servicos de Comunicao S.A
10620 2360 2124 TVCABLE BOGOTA
4766 2951 2029 Korea Telecom (KIX)
7029 2183 1970 Windstream Communications Inc
18566 2070 1885 Covad Communications
22773 2006 1881 Cox Communications, Inc.
1785 1973 1848 PaeTec Communications, Inc.
8402 1832 1816 Corbina telecom
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 /11:87 /12:248
/13:482 /14:876 /15:1560 /16:12663 /17:6613 /18:10882
/19:21746 /20:31803 /21:33562 /22:46216 /23:41532 /24:234733
/25:1398 /26:1780 /27:864 /28:180 /29:63 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2020 2070 Covad Communications
6389 1742 3032 bellsouth.net, inc.
7029 1597 2183 Windstream Communications Inc
8402 1532 1832 Corbina telecom
22773 1313 2006 Cox Communications, Inc.
30036 1203 1323 Mediacom Communications Corp
11492 1177 1215 Cable One
36998 1131 1137 MOBITEL
1785 1044 1973 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)
----------------------------------------------

1:740 2:767 3:3 4:13 5:836 6:3
8:514 12:1919 13:3 14:763 15:11 16:3
17:8 20:19 23:248 24:1801 27:1447 31:1178
32:44 33:2 34:5 36:43 37:1700 38:863
39:2 40:164 41:2608 42:183 44:6 46:1764
47:2 49:621 50:671 52:12 54:28 55:8
57:27 58:1106 59:564 60:296 61:1380 62:978
63:2039 64:4292 65:2177 66:4283 67:2061 68:1114
69:3275 70:874 71:526 72:1898 74:2554 75:402
76:288 77:1090 78:1016 79:580 80:1251 81:970
82:610 83:579 84:555 85:1151 86:469 87:948
88:509 89:1792 90:262 91:5447 92:617 93:1689
94:1865 95:1542 96:499 97:340 98:1051 99:41
100:29 101:311 103:2336 105:488 106:134 107:207
108:514 109:1803 110:874 111:1043 112:499 113:767
114:684 115:958 116:870 117:798 118:1011 119:1257
120:382 121:717 122:1722 123:1194 124:1328 125:1316
128:630 129:222 130:331 131:655 132:331 133:145
134:258 135:62 136:219 137:244 138:343 139:181
140:197 141:313 142:543 143:365 144:482 145:90
146:524 147:362 148:697 149:356 150:163 151:548
152:415 153:194 154:34 155:383 156:260 157:390
158:271 159:711 160:331 161:422 162:374 163:202
164:576 165:451 166:360 167:575 168:1015 169:132
170:1020 171:171 172:4 173:1580 174:577 175:438
176:987 177:1864 178:1981 179:1 180:1388 181:300
182:1045 183:355 184:662 185:326 186:2399 187:1244
188:1907 189:1403 190:6684 192:6465 193:5670 194:4521
195:3468 196:1287 197:763 198:4279 199:5280 200:6041
201:2363 202:8882 203:8753 204:4485 205:2551 206:2789
207:2829 208:4070 209:3544 210:2916 211:1564 212:1998
213:1930 214:914 215:94 216:5192 217:1579 218:606
219:330 220:1264 221:544 222:319 223:499

End of report
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