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, October 15, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 16 Oct, 2012

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

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

BGP routing table entries examined: 428266
Prefixes after maximum aggregation: 179241
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 210531
Total ASes present in the Internet Routing Table: 42364
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33752
Origin ASes announcing only one prefix: 15797
Transit ASes present in the Internet Routing Table: 5621
Transit-only ASes present in the Internet Routing Table: 144
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 842
Unregistered ASNs in the Routing Table: 303
Number of 32-bit ASNs allocated by the RIRs: 3381
Number of 32-bit ASNs visible in the Routing Table: 2991
Prefixes from 32-bit ASNs in the Routing Table: 8107
Special use prefixes present in the Routing Table: 13
Prefixes being announced from unallocated address space: 162
Number of addresses announced to Internet: 2604761708
Equivalent to 155 /8s, 65 /16s and 130 /24s
Percentage of available address space announced: 70.4
Percentage of allocated address space announced: 70.4
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.8
Total number of prefixes smaller than registry allocations: 150174

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

Prefixes being announced by APNIC Region ASes: 103090
Total APNIC prefixes after maximum aggregation: 32557
APNIC Deaggregation factor: 3.17
Prefixes being announced from the APNIC address blocks: 103817
Unique aggregates announced from the APNIC address blocks: 42953
APNIC Region origin ASes present in the Internet Routing Table: 4778
APNIC Prefixes per ASN: 21.73
APNIC Region origin ASes announcing only one prefix: 1253
APNIC Region transit ASes present in the Internet Routing Table: 770
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 329
Number of APNIC addresses announced to Internet: 711112608
Equivalent to 42 /8s, 98 /16s and 183 /24s
Percentage of available APNIC address space announced: 83.1

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: 154625
Total ARIN prefixes after maximum aggregation: 78314
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 155467
Unique aggregates announced from the ARIN address blocks: 69401
ARIN Region origin ASes present in the Internet Routing Table: 15274
ARIN Prefixes per ASN: 10.18
ARIN Region origin ASes announcing only one prefix: 5779
ARIN Region transit ASes present in the Internet Routing Table: 1596
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1086826880
Equivalent to 64 /8s, 199 /16s and 169 /24s
Percentage of available ARIN address space announced: 57.5

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: 109029
Total RIPE prefixes after maximum aggregation: 57394
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 111660
Unique aggregates announced from the RIPE address blocks: 71909
RIPE Region origin ASes present in the Internet Routing Table: 16912
RIPE Prefixes per ASN: 6.60
RIPE Region origin ASes announcing only one prefix: 8137
RIPE Region transit ASes present in the Internet Routing Table: 2722
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1945
Number of RIPE addresses announced to Internet: 646891044
Equivalent to 38 /8s, 142 /16s and 198 /24s
Percentage of available RIPE address space announced: 94.0

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: 43832
Total LACNIC prefixes after maximum aggregation: 8684
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 47218
Unique aggregates announced from the LACNIC address blocks: 22575
LACNIC Region origin ASes present in the Internet Routing Table: 1668
LACNIC Prefixes per ASN: 28.31
LACNIC Region origin ASes announcing only one prefix: 454
LACNIC Region transit ASes present in the Internet Routing Table: 318
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 694
Number of LACNIC addresses announced to Internet: 117510440
Equivalent to 7 /8s, 1 /16s and 17 /24s
Percentage of available LACNIC address space announced: 70.0

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: 9467
Total AfriNIC prefixes after maximum aggregation: 2235
AfriNIC Deaggregation factor: 4.24
Prefixes being announced from the AfriNIC address blocks: 9942
Unique aggregates announced from the AfriNIC address blocks: 3551
AfriNIC Region origin ASes present in the Internet Routing Table: 564
AfriNIC Prefixes per ASN: 17.63
AfriNIC Region origin ASes announcing only one prefix: 174
AfriNIC Region transit ASes present in the Internet Routing Table: 127
Average AfriNIC Region AS path length visible: 4.6
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: 42119936
Equivalent to 2 /8s, 130 /16s and 179 /24s
Percentage of available AfriNIC address space announced: 41.8

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 2973 11428 902 Korea Telecom (KIX)
17974 2365 830 54 PT TELEKOMUNIKASI INDONESIA
7545 1766 301 86 TPG Internet Pty Ltd
4755 1617 387 163 TATA Communications formerly
9829 1401 1154 41 BSNL National Internet Backbo
9583 1226 90 518 Sify Limited
7552 1121 1062 11 Vietel Corporation
4808 1113 2060 316 CNCGROUP IP network: China169
24560 1034 385 162 Bharti Airtel Ltd., Telemedia
9498 1023 310 74 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 3201 3727 173 bellsouth.net, inc.
7029 3129 990 162 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1927 678 128 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
20115 1657 1582 619 Charter Communications
4323 1587 1155 392 Time Warner Telecom
30036 1345 268 752 Mediacom Communications Corp
7018 1265 10304 839 AT&T WorldNet Services
7011 1206 329 700 Citizens Utilities

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 1817 544 16 Corbina telecom
2118 1172 97 14 EUnet/RELCOM Autonomous Syste
12479 848 776 64 Uni2 Autonomous System
34984 797 206 182 BILISIM TELEKOM
31148 725 37 9 FreeNet ISP
6830 722 2313 444 UPC Distribution Services
20940 709 224 540 Akamai Technologies European
13188 698 92 154 Educational Network
58113 603 67 364 LIR DATACENTER TELECOM SRL
8551 574 364 61 Bezeq International

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 2203 379 219 TVCABLE BOGOTA
28573 2130 1277 60 NET Servicos de Comunicao S.A
8151 1587 3028 355 UniNet S.A. de C.V.
7303 1566 1035 203 Telecom Argentina Stet-France
6503 1539 435 69 AVANTEL, S.A.
27947 728 74 91 Telconet S.A
3816 649 309 70 Empresa Nacional de Telecomun
11172 596 85 66 Servicios Alestra S.A de C.V
14420 588 87 102 CORPORACION NACIONAL DE TELEC
7738 586 1178 33 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 894 275 36 LINKdotNET AS number
36998 720 48 3 MOBITEL
8452 642 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 270 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 192 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 172 682 85 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 3201 3727 173 bellsouth.net, inc.
7029 3129 990 162 Windstream Communications Inc
4766 2973 11428 902 Korea Telecom (KIX)
17974 2365 830 54 PT TELEKOMUNIKASI INDONESIA
10620 2203 379 219 TVCABLE BOGOTA
28573 2130 1277 60 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1927 678 128 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
8402 1817 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
7029 3129 2967 Windstream Communications Inc
17974 2365 2311 PT TELEKOMUNIKASI INDONESIA
4766 2973 2071 Korea Telecom (KIX)
28573 2130 2070 NET Servicos de Comunicao S.A
10620 2203 1984 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
8402 1817 1801 Corbina telecom
1785 1927 1799 PaeTec Communications, Inc.
22773 1907 1779 Cox Communications, Inc.
7545 1766 1680 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
59505 UNALLOCATED 5.2.65.0/24 50673 Serverius AS
59505 UNALLOCATED 5.2.66.0/24 50673 Serverius AS
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 3549 Global Crossing
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59521 UNALLOCATED 5.134.192.0/21 29518 Labs2
59441 UNALLOCATED 5.144.128.0/21 50810 Mobin Net Communicat
59581 UNALLOCATED 5.149.8.0/21 25577 C4L main AS
59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o.

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition
128.0.168.0/21 15772 W-NET Kiev

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

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

Network Origin AS Description
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
14.192.28.0/22 45464 Room 201, TGU Bldg
27.112.114.0/24 23884 Proimage Engineering and Comm
41.220.80.0/24 38925 DAC AS Germany

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 /8:18 /9:14 /10:29 /11:87 /12:241
/13:478 /14:849 /15:1546 /16:12440 /17:6492 /18:10851
/19:21188 /20:30392 /21:32456 /22:42917 /23:40152 /24:223899
/25:1350 /26:1677 /27:905 /28:178 /29:65 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2619 3129 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1794 3201 bellsouth.net, inc.
8402 1531 1817 Corbina telecom
30036 1273 1345 Mediacom Communications Corp
22773 1246 1907 Cox Communications, Inc.
11492 1166 1203 Cable One
6503 1054 1539 AVANTEL, S.A.
1785 1016 1927 PaeTec Communications, Inc.
7011 945 1206 Citizens Utilities

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

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

1:641 2:776 3:1 4:13 5:566 6:3
8:489 12:1981 13:1 14:669 15:11 16:3
17:6 20:27 23:201 24:1790 27:1370 31:1028
32:54 33:2 34:2 36:7 37:847 38:829
39:2 40:137 41:2719 42:158 44:3 46:1642
47:2 49:458 50:591 52:12 54:25 55:9
56:5 57:27 58:988 59:542 60:237 61:1293
62:935 63:1998 64:4286 65:2234 66:4510 67:2079
68:1155 69:3220 70:988 71:505 72:1874 74:2603
75:485 76:311 77:983 78:975 79:502 80:1238
81:972 82:641 83:536 84:522 85:1155 86:492
87:948 88:362 89:1806 90:304 91:5252 92:598
93:1498 94:1645 95:1163 96:395 97:325 98:961
99:39 100:32 101:269 103:1648 105:460 106:120
107:199 108:475 109:1594 110:804 111:968 112:445
113:709 114:622 115:878 116:887 117:737 118:958
119:1228 120:345 121:684 122:1640 123:1155 124:1334
125:1284 128:564 129:196 130:281 131:637 132:310
133:22 134:252 135:62 136:221 137:239 138:337
139:170 140:501 141:282 142:494 143:376 144:500
145:82 146:509 147:270 148:755 149:327 150:157
151:197 152:450 153:179 154:20 155:430 156:227
157:373 158:262 159:657 160:347 161:412 162:364
163:191 164:709 165:428 166:528 167:552 168:990
169:126 170:914 171:166 172:7 173:1658 174:626
175:451 176:779 177:1284 178:1628 180:1344 181:162
182:1088 183:305 184:596 185:29 186:2189 187:1346
188:1749 189:1599 190:5820 192:6038 193:5523 194:4606
195:3663 196:1235 197:235 198:3853 199:5080 200:6008
201:1966 202:8659 203:8693 204:4399 205:2532 206:2768
207:2801 208:4049 209:3632 210:2836 211:1535 212:2016
213:1821 214:890 215:87 216:5117 217:1573 218:570
219:315 220:1250 221:533 222:337 223:416

End of report
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