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 6, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 07 Mar, 2013

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

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

BGP routing table entries examined: 445462
Prefixes after maximum aggregation: 183055
Deaggregation factor: 2.43
Unique aggregates announced to Internet: 218534
Total ASes present in the Internet Routing Table: 43507
Prefixes per ASN: 10.24
Origin-only ASes present in the Internet Routing Table: 34278
Origin ASes announcing only one prefix: 15989
Transit ASes present in the Internet Routing Table: 5779
Transit-only ASes present in the Internet Routing Table: 134
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 30
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 366
Unregistered ASNs in the Routing Table: 135
Number of 32-bit ASNs allocated by the RIRs: 3822
Number of 32-bit ASNs visible in the Routing Table: 3450
Prefixes from 32-bit ASNs in the Routing Table: 9586
Special use prefixes present in the Routing Table: 17
Prefixes being announced from unallocated address space: 189
Number of addresses announced to Internet: 2619674348
Equivalent to 156 /8s, 37 /16s and 14 /24s
Percentage of available address space announced: 70.8
Percentage of allocated address space announced: 70.8
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: 157372

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

Prefixes being announced by APNIC Region ASes: 106940
Total APNIC prefixes after maximum aggregation: 33163
APNIC Deaggregation factor: 3.22
Prefixes being announced from the APNIC address blocks: 108043
Unique aggregates announced from the APNIC address blocks: 44036
APNIC Region origin ASes present in the Internet Routing Table: 4817
APNIC Prefixes per ASN: 22.43
APNIC Region origin ASes announcing only one prefix: 1236
APNIC Region transit ASes present in the Internet Routing Table: 815
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 448
Number of APNIC addresses announced to Internet: 719188960
Equivalent to 42 /8s, 221 /16s and 243 /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: 156492
Total ARIN prefixes after maximum aggregation: 79096
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 157227
Unique aggregates announced from the ARIN address blocks: 71443
ARIN Region origin ASes present in the Internet Routing Table: 15522
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5883
ARIN Region transit ASes present in the Internet Routing Table: 1616
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: 1076871808
Equivalent to 64 /8s, 47 /16s and 194 /24s
Percentage of available ARIN address space announced: 57.0

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: 114299
Total RIPE prefixes after maximum aggregation: 59054
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 117597
Unique aggregates announced from the RIPE address blocks: 75298
RIPE Region origin ASes present in the Internet Routing Table: 17099
RIPE Prefixes per ASN: 6.88
RIPE Region origin ASes announcing only one prefix: 8158
RIPE Region transit ASes present in the Internet Routing Table: 2785
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: 2229
Number of RIPE addresses announced to Internet: 653733476
Equivalent to 38 /8s, 247 /16s and 46 /24s
Percentage of available RIPE address space announced: 95.0

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: 47362
Total LACNIC prefixes after maximum aggregation: 9242
LACNIC Deaggregation factor: 5.12
Prefixes being announced from the LACNIC address blocks: 51163
Unique aggregates announced from the LACNIC address blocks: 23775
LACNIC Region origin ASes present in the Internet Routing Table: 1848
LACNIC Prefixes per ASN: 27.69
LACNIC Region origin ASes announcing only one prefix: 534
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: 27
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 748
Number of LACNIC addresses announced to Internet: 124221480
Equivalent to 7 /8s, 103 /16s and 120 /24s
Percentage of available LACNIC address space announced: 74.0

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: 10655
Total AfriNIC prefixes after maximum aggregation: 2449
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 11243
Unique aggregates announced from the AfriNIC address blocks: 3812
AfriNIC Region origin ASes present in the Internet Routing Table: 607
AfriNIC Prefixes per ASN: 18.52
AfriNIC Region origin ASes announcing only one prefix: 178
AfriNIC Region transit ASes present in the Internet Routing Table: 130
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: 45322496
Equivalent to 2 /8s, 179 /16s and 145 /24s
Percentage of available AfriNIC address space announced: 45.0

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 2930 11558 923 Korea Telecom (KIX)
17974 2503 840 86 PT TELEKOMUNIKASI INDONESIA
7545 1829 301 89 TPG Internet Pty Ltd
4755 1698 390 189 TATA Communications formerly
9829 1450 1158 43 BSNL National Internet Backbo
9583 1284 98 535 Sify Limited
7552 1161 1070 12 Vietel Corporation
4808 1117 2058 322 CNCGROUP IP network: China169
9498 1066 310 75 BHARTI Airtel Ltd.
24560 1045 385 161 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 3048 3695 94 bellsouth.net, inc.
7029 2141 1265 212 Windstream Communications Inc
18566 2080 382 185 Covad Communications
22773 1986 2929 124 Cox Communications, Inc.
1785 1958 677 123 PaeTec Communications, Inc.
20115 1681 1611 620 Charter Communications
4323 1609 1140 401 Time Warner Telecom
30036 1345 292 686 Mediacom Communications Corp
7018 1299 10553 850 AT&T WorldNet Services
11492 1208 221 335 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 1885 544 16 Corbina telecom
2118 1116 97 13 EUnet/RELCOM Autonomous Syste
34984 1080 232 205 BILISIM TELEKOM
13188 839 99 30 Educational Network
12479 833 784 68 Uni2 Autonomous System
31148 767 40 18 FreeNet ISP
20940 764 260 606 Akamai Technologies European
6830 714 2313 435 UPC Distribution Services
8551 711 370 43 Bezeq International
34744 669 185 24 SC GVM SISTEM 2003 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 2419 1332 85 NET Servicos de Comunicao S.A
10620 2344 403 227 TVCABLE BOGOTA
7303 1681 1147 207 Telecom Argentina Stet-France
8151 1351 2721 402 UniNet S.A. de C.V.
6503 1330 435 68 AVANTEL, S.A.
14754 943 128 76 Telgua S. A.
18881 808 716 18 Global Village Telecom
27947 785 86 101 Telconet S.A
3816 688 306 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
36998 1286 80 4 MOBITEL
24863 895 274 34 LINKdotNET AS number
6713 535 615 23 Itissalat Al-MAGHRIB
8452 516 958 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 187 696 90 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 3048 3695 94 bellsouth.net, inc.
4766 2930 11558 923 Korea Telecom (KIX)
17974 2503 840 86 PT TELEKOMUNIKASI INDONESIA
28573 2419 1332 85 NET Servicos de Comunicao S.A
10620 2344 403 227 TVCABLE BOGOTA
7029 2141 1265 212 Windstream Communications Inc
18566 2080 382 185 Covad Communications
22773 1986 2929 124 Cox Communications, Inc.
1785 1958 677 123 PaeTec Communications, Inc.
8402 1885 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 2419 2334 NET Servicos de Comunicao S.A
10620 2344 2117 TVCABLE BOGOTA
4766 2930 2007 Korea Telecom (KIX)
7029 2141 1929 Windstream Communications Inc
18566 2080 1895 Covad Communications
8402 1885 1869 Corbina telecom
22773 1986 1862 Cox Communications, Inc.
1785 1958 1835 PaeTec Communications, Inc.
7545 1829 1740 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
65119 PRIVATE 8.36.67.0/24 6352 E*Trade Group
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

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
128.0.60.0/23 57417 INTERNET TASMANIA SRL
128.0.62.0/23 57417 INTERNET TASMANIA SRL
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

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
/13:483 /14:868 /15:1564 /16:12642 /17:6619 /18:10908
/19:21711 /20:31439 /21:33514 /22:46019 /23:41458 /24:233565
/25:1370 /26:1767 /27:860 /28:183 /29:61 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
18566 2030 2080 Covad Communications
6389 1751 3048 bellsouth.net, inc.
8402 1608 1885 Corbina telecom
7029 1557 2141 Windstream Communications Inc
22773 1301 1986 Cox Communications, Inc.
36998 1280 1286 MOBITEL
30036 1229 1345 Mediacom Communications Corp
11492 1170 1208 Cable One
1785 1038 1958 PaeTec Communications, Inc.
7011 955 1203 Citizens Utilities

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

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

1:721 2:788 3:3 4:13 5:691 6:3
8:502 12:1931 13:3 14:747 15:11 16:3
17:8 20:24 23:242 24:1801 27:1462 31:1147
32:54 33:2 34:5 36:27 37:1331 38:857
39:2 40:153 41:2711 42:177 44:4 46:1769
47:1 49:609 50:662 52:12 54:28 55:9
57:28 58:1079 59:568 60:293 61:1355 62:1035
63:2036 64:4277 65:2178 66:4239 67:2055 68:1122
69:3263 70:863 71:523 72:1890 74:2552 75:408
76:291 77:1082 78:1031 79:572 80:1230 81:972
82:616 83:547 84:557 85:1161 86:474 87:946
88:374 89:1763 90:262 91:5426 92:606 93:1740
94:2078 95:1586 96:497 97:334 98:1036 99:40
100:29 101:298 103:2255 105:517 106:131 107:207
108:506 109:1800 110:852 111:1019 112:493 113:759
114:689 115:929 116:881 117:800 118:985 119:1268
120:376 121:705 122:1734 123:1195 124:1318 125:1314
128:660 129:205 130:318 131:646 132:343 133:143
134:252 135:62 136:221 137:236 138:342 139:169
140:215 141:312 142:524 143:392 144:488 145:88
146:518 147:355 148:708 149:358 150:156 151:437
152:403 153:196 154:29 155:376 156:249 157:392
158:265 159:712 160:336 161:420 162:374 163:206
164:579 165:453 166:432 167:572 168:1021 169:131
170:1021 171:168 172:4 173:1582 174:583 175:424
176:1135 177:1698 178:1776 179:1 180:1365 181:267
182:1197 183:337 184:659 185:274 186:2315 187:1305
188:1924 189:1505 190:6650 192:6388 193:5660 194:4512
195:3495 196:1304 197:924 198:4196 199:5244 200:6024
201:2213 202:8906 203:8746 204:4489 205:2550 206:2791
207:2794 208:4058 209:3522 210:2895 211:1559 212:1989
213:1958 214:911 215:97 216:5190 217:1579 218:603
219:328 220:1264 221:546 222:316 223:472

End of report
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