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, March 20, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 21 Mar, 2013

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

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

BGP routing table entries examined: 446136
Prefixes after maximum aggregation: 183316
Deaggregation factor: 2.43
Unique aggregates announced to Internet: 219540
Total ASes present in the Internet Routing Table: 43612
Prefixes per ASN: 10.23
Origin-only ASes present in the Internet Routing Table: 34348
Origin ASes announcing only one prefix: 16008
Transit ASes present in the Internet Routing Table: 5781
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: 39
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 371
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 4630
Number of 32-bit ASNs visible in the Routing Table: 3483
Prefixes from 32-bit ASNs in the Routing Table: 9782
Special use prefixes present in the Routing Table: 16
Prefixes being announced from unallocated address space: 199
Number of addresses announced to Internet: 2623119276
Equivalent to 156 /8s, 89 /16s and 159 /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: 156978

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

Prefixes being announced by APNIC Region ASes: 107405
Total APNIC prefixes after maximum aggregation: 33193
APNIC Deaggregation factor: 3.24
Prefixes being announced from the APNIC address blocks: 108548
Unique aggregates announced from the APNIC address blocks: 44230
APNIC Region origin ASes present in the Internet Routing Table: 4823
APNIC Prefixes per ASN: 22.51
APNIC Region origin ASes announcing only one prefix: 1232
APNIC Region transit ASes present in the Internet Routing Table: 822
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 466
Number of APNIC addresses announced to Internet: 719169344
Equivalent to 42 /8s, 221 /16s and 167 /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: 157034
Total ARIN prefixes after maximum aggregation: 79258
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157696
Unique aggregates announced from the ARIN address blocks: 71986
ARIN Region origin ASes present in the Internet Routing Table: 15557
ARIN Prefixes per ASN: 10.14
ARIN Region origin ASes announcing only one prefix: 5893
ARIN Region transit ASes present in the Internet Routing Table: 1608
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: 1078536064
Equivalent to 64 /8s, 73 /16s and 39 /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: 114376
Total RIPE prefixes after maximum aggregation: 59072
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 117806
Unique aggregates announced from the RIPE address blocks: 75655
RIPE Region origin ASes present in the Internet Routing Table: 17105
RIPE Prefixes per ASN: 6.89
RIPE Region origin ASes announcing only one prefix: 8150
RIPE Region transit ASes present in the Internet Routing Table: 2787
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 39
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2244
Number of RIPE addresses announced to Internet: 654507492
Equivalent to 39 /8s, 2 /16s and 253 /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: 47419
Total LACNIC prefixes after maximum aggregation: 9317
LACNIC Deaggregation factor: 5.09
Prefixes being announced from the LACNIC address blocks: 51271
Unique aggregates announced from the LACNIC address blocks: 23764
LACNIC Region origin ASes present in the Internet Routing Table: 1870
LACNIC Prefixes per ASN: 27.42
LACNIC Region origin ASes announcing only one prefix: 551
LACNIC Region transit ASes present in the Internet Routing Table: 346
Average LACNIC Region AS path length visible: 4.9
Max LACNIC Region AS path length visible: 27
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 748
Number of LACNIC addresses announced to Internet: 124627208
Equivalent to 7 /8s, 109 /16s and 169 /24s
Percentage of available LACNIC address space announced: 74.3

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: 9994
Total AfriNIC prefixes after maximum aggregation: 2426
AfriNIC Deaggregation factor: 4.12
Prefixes being announced from the AfriNIC address blocks: 10616
Unique aggregates announced from the AfriNIC address blocks: 3727
AfriNIC Region origin ASes present in the Internet Routing Table: 607
AfriNIC Prefixes per ASN: 17.49
AfriNIC Region origin ASes announcing only one prefix: 182
AfriNIC Region transit ASes present in the Internet Routing Table: 129
Average AfriNIC Region AS path length visible: 4.7
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: 45920768
Equivalent to 2 /8s, 188 /16s and 178 /24s
Percentage of available AfriNIC address space announced: 45.6

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 2950 11558 922 Korea Telecom (KIX)
17974 2503 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1839 301 89 TPG Internet Pty Ltd
4755 1722 392 196 TATA Communications formerly
9829 1469 1173 43 BSNL National Internet Backbo
9583 1278 97 525 Sify Limited
7552 1161 1070 12 Vietel Corporation
4808 1115 2056 320 CNCGROUP IP network: China169
9498 1068 310 75 BHARTI Airtel Ltd.
24560 1060 385 165 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 3037 3695 91 bellsouth.net, inc.
7029 2200 1266 215 Windstream Communications Inc
18566 2081 382 185 Covad Communications
22773 1993 2929 125 Cox Communications, Inc.
1785 1965 677 125 PaeTec Communications, Inc.
20115 1682 1612 621 Charter Communications
4323 1614 1139 401 Time Warner Telecom
30036 1336 293 686 Mediacom Communications Corp
7018 1308 10809 850 AT&T WorldNet Services
11492 1210 222 329 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 1883 544 16 Corbina telecom
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
34984 1108 234 206 BILISIM TELEKOM
13188 838 99 34 Educational Network
12479 836 786 66 Uni2 Autonomous System
20940 796 276 632 Akamai Technologies European
31148 781 40 18 FreeNet ISP
8551 716 370 43 Bezeq International
6830 715 2314 436 UPC Distribution Services
58113 664 73 386 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 2471 1338 91 NET Servicos de Comunicao S.A
10620 2354 405 232 TVCABLE BOGOTA
7303 1673 1148 209 Telecom Argentina Stet-France
8151 1341 2671 399 UniNet S.A. de C.V.
6503 1230 435 68 AVANTEL, S.A.
14754 942 128 85 Telgua S. A.
18881 833 716 18 Global Village Telecom
27947 794 87 95 Telconet S.A
3816 692 306 85 Empresa Nacional de Telecomun
7738 650 1306 35 Telecomunicacoes da Bahia 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
24863 893 274 34 LINKdotNET AS number
36998 582 80 4 MOBITEL
6713 528 613 22 Itissalat Al-MAGHRIB
8452 512 958 13 TEDATA
24835 342 80 8 RAYA Telecom - Egypt
3741 262 906 220 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 190 698 88 MTN Network Solutions

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 3037 3695 91 bellsouth.net, inc.
4766 2950 11558 922 Korea Telecom (KIX)
17974 2503 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2471 1338 91 NET Servicos de Comunicao S.A
10620 2354 405 232 TVCABLE BOGOTA
7029 2200 1266 215 Windstream Communications Inc
18566 2081 382 185 Covad Communications
22773 1993 2929 125 Cox Communications, Inc.
1785 1965 677 125 PaeTec Communications, Inc.
8402 1883 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 2503 2417 PT TELEKOMUNIKASI INDONESIA
28573 2471 2380 NET Servicos de Comunicao S.A
10620 2354 2122 TVCABLE BOGOTA
4766 2950 2028 Korea Telecom (KIX)
7029 2200 1985 Windstream Communications Inc
18566 2081 1896 Covad Communications
22773 1993 1868 Cox Communications, Inc.
8402 1883 1867 Corbina telecom
1785 1965 1840 PaeTec Communications, Inc.
7545 1839 1750 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 /12:247
/13:482 /14:873 /15:1561 /16:12651 /17:6600 /18:10916
/19:21703 /20:31709 /21:33588 /22:46151 /23:41634 /24:233689
/25:1361 /26:1672 /27:861 /28:180 /29:73 /30:18
/31:0 /32:20

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

ASN No of nets Total ann. Description
18566 2031 2081 Covad Communications
6389 1743 3037 bellsouth.net, inc.
8402 1604 1883 Corbina telecom
7029 1587 2200 Windstream Communications Inc
22773 1304 1993 Cox Communications, Inc.
30036 1219 1336 Mediacom Communications Corp
11492 1172 1210 Cable One
1785 1041 1965 PaeTec Communications, Inc.
7011 950 1198 Citizens Utilities
6983 921 1031 ITC^Deltacom

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

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

1:726 2:788 3:3 4:13 5:706 6:3
8:510 12:1931 13:3 14:763 15:11 16:3
17:8 20:19 23:244 24:1800 27:1453 31:1177
32:44 33:2 34:5 36:43 37:1450 38:861
39:2 40:159 41:2706 42:182 44:6 46:1738
47:2 49:611 50:667 52:12 54:28 55:10
57:27 58:1102 59:580 60:303 61:1396 62:1001
63:2038 64:4288 65:2179 66:4277 67:2054 68:1118
69:3264 70:881 71:520 72:1897 74:2552 75:400
76:289 77:1084 78:1016 79:576 80:1237 81:971
82:646 83:559 84:569 85:1151 86:471 87:947
88:379 89:1767 90:262 91:5435 92:606 93:1713
94:1870 95:1579 96:499 97:336 98:1049 99:41
100:29 101:312 103:2303 105:263 106:131 107:207
108:517 109:1796 110:851 111:1040 112:498 113:766
114:683 115:973 116:880 117:808 118:1007 119:1259
120:379 121:779 122:1739 123:1195 124:1325 125:1314
128:549 129:221 130:324 131:649 132:332 133:143
134:256 135:60 136:221 137:242 138:342 139:178
140:199 141:318 142:533 143:372 144:490 145:89
146:521 147:365 148:708 149:357 150:158 151:469
152:413 153:194 154:32 155:381 156:251 157:393
158:268 159:712 160:334 161:425 162:375 163:208
164:579 165:452 166:390 167:575 168:1012 169:131
170:1023 171:168 172:4 173:1594 174:584 175:435
176:1157 177:1801 178:1809 179:1 180:1382 181:286
182:1220 183:350 184:661 185:298 186:2346 187:1267
188:1925 189:1442 190:6628 192:6418 193:5680 194:4516
195:3472 196:1310 197:535 198:4221 199:5266 200:6030
201:2257 202:8911 203:8761 204:4487 205:2579 206:2787
207:2824 208:4057 209:3538 210:2909 211:1563 212:2005
213:1952 214:918 215:95 216:5191 217:1569 218:604
219:337 220:1269 221:547 222:316 223:491

End of report
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