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, December 31, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 01 Jan, 2013

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

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

BGP routing table entries examined: 438575
Prefixes after maximum aggregation: 181118
Deaggregation factor: 2.42
Unique aggregates announced to Internet: 215488
Total ASes present in the Internet Routing Table: 42960
Prefixes per ASN: 10.21
Origin-only ASes present in the Internet Routing Table: 33996
Origin ASes announcing only one prefix: 15917
Transit ASes present in the Internet Routing Table: 5709
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 31
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 374
Unregistered ASNs in the Routing Table: 133
Number of 32-bit ASNs allocated by the RIRs: 3616
Number of 32-bit ASNs visible in the Routing Table: 3255
Prefixes from 32-bit ASNs in the Routing Table: 8764
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 174
Number of addresses announced to Internet: 2620739340
Equivalent to 156 /8s, 53 /16s and 79 /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: 94.1
Total number of prefixes smaller than registry allocations: 155077

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

Prefixes being announced by APNIC Region ASes: 105440
Total APNIC prefixes after maximum aggregation: 32841
APNIC Deaggregation factor: 3.21
Prefixes being announced from the APNIC address blocks: 106355
Unique aggregates announced from the APNIC address blocks: 43553
APNIC Region origin ASes present in the Internet Routing Table: 4812
APNIC Prefixes per ASN: 22.10
APNIC Region origin ASes announcing only one prefix: 1251
APNIC Region transit ASes present in the Internet Routing Table: 795
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: 396
Number of APNIC addresses announced to Internet: 716739584
Equivalent to 42 /8s, 184 /16s and 148 /24s
Percentage of available APNIC address space announced: 83.8

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: 156177
Total ARIN prefixes after maximum aggregation: 78453
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 156854
Unique aggregates announced from the ARIN address blocks: 70696
ARIN Region origin ASes present in the Internet Routing Table: 15361
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 5812
ARIN Region transit ASes present in the Internet Routing Table: 1591
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 25
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1089405312
Equivalent to 64 /8s, 239 /16s and 1 /24s
Percentage of available ARIN address space announced: 57.6

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: 112934
Total RIPE prefixes after maximum aggregation: 58360
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 115873
Unique aggregates announced from the RIPE address blocks: 74306
RIPE Region origin ASes present in the Internet Routing Table: 17009
RIPE Prefixes per ASN: 6.81
RIPE Region origin ASes announcing only one prefix: 8160
RIPE Region transit ASes present in the Internet Routing Table: 2767
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 31
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2106
Number of RIPE addresses announced to Internet: 650498404
Equivalent to 38 /8s, 197 /16s and 209 /24s
Percentage of available RIPE address space announced: 94.6

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: 45397
Total LACNIC prefixes after maximum aggregation: 9049
LACNIC Deaggregation factor: 5.02
Prefixes being announced from the LACNIC address blocks: 48980
Unique aggregates announced from the LACNIC address blocks: 23138
LACNIC Region origin ASes present in the Internet Routing Table: 1765
LACNIC Prefixes per ASN: 27.75
LACNIC Region origin ASes announcing only one prefix: 504
LACNIC Region transit ASes present in the Internet Routing Table: 336
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 30
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 730
Number of LACNIC addresses announced to Internet: 120887080
Equivalent to 7 /8s, 52 /16s and 151 /24s
Percentage of available LACNIC address space announced: 72.1

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: 9743
Total AfriNIC prefixes after maximum aggregation: 2362
AfriNIC Deaggregation factor: 4.12
Prefixes being announced from the AfriNIC address blocks: 10339
Unique aggregates announced from the AfriNIC address blocks: 3640
AfriNIC Region origin ASes present in the Internet Routing Table: 589
AfriNIC Prefixes per ASN: 17.55
AfriNIC Region origin ASes announcing only one prefix: 190
AfriNIC Region transit ASes present in the Internet Routing Table: 131
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: 6
Number of AfriNIC addresses announced to Internet: 42906880
Equivalent to 2 /8s, 142 /16s and 181 /24s
Percentage of available AfriNIC address space announced: 42.6

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 2946 11556 914 Korea Telecom (KIX)
17974 2484 829 54 PT TELEKOMUNIKASI INDONESIA
7545 1815 301 88 TPG Internet Pty Ltd
4755 1662 381 175 TATA Communications formerly
9829 1416 1155 41 BSNL National Internet Backbo
9583 1184 88 501 Sify Limited
7552 1143 1070 12 Vietel Corporation
4808 1124 2040 316 CNCGROUP IP network: China169
9498 1052 309 74 BHARTI Airtel Ltd.
24560 1037 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
7029 3455 1010 215 Windstream Communications Inc
6389 3117 3701 131 bellsouth.net, inc.
18566 2081 382 180 Covad Communications
22773 1950 2932 131 Cox Communications, Inc.
1785 1941 678 124 PaeTec Communications, Inc.
20115 1688 1603 618 Charter Communications
4323 1597 1155 397 Time Warner Telecom
30036 1358 287 704 Mediacom Communications Corp
7018 1293 10549 853 AT&T WorldNet Services
7011 1206 321 685 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 1689 544 16 Corbina telecom
2118 1052 97 15 EUnet/RELCOM Autonomous Syste
34984 895 211 232 BILISIM TELEKOM
12479 869 777 64 Uni2 Autonomous System
13188 771 99 76 Educational Network
31148 743 38 15 FreeNet ISP
20940 731 240 569 Akamai Technologies European
6830 714 2313 435 UPC Distribution Services
8551 637 367 39 Bezeq International
58113 633 70 378 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
10620 2270 387 207 TVCABLE BOGOTA
28573 2266 1299 70 NET Servicos de Comunicao S.A
7303 1674 1139 202 Telecom Argentina Stet-France
8151 1543 2925 356 UniNet S.A. de C.V.
6503 1454 435 67 AVANTEL, S.A.
27947 768 85 94 Telconet S.A
18881 740 716 18 Global Village Telecom
3816 672 309 71 Empresa Nacional de Telecomun
11172 601 86 66 Servicios Alestra S.A de C.V
7738 588 1242 34 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 877 275 36 LINKdotNET AS number
36998 749 48 3 MOBITEL
8452 539 958 13 TEDATA
6713 499 602 20 Itissalat Al-MAGHRIB
24835 291 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 193 28 67 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 181 697 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
7029 3455 1010 215 Windstream Communications Inc
6389 3117 3701 131 bellsouth.net, inc.
4766 2946 11556 914 Korea Telecom (KIX)
17974 2484 829 54 PT TELEKOMUNIKASI INDONESIA
10620 2270 387 207 TVCABLE BOGOTA
28573 2266 1299 70 NET Servicos de Comunicao S.A
18566 2081 382 180 Covad Communications
22773 1950 2932 131 Cox Communications, Inc.
1785 1941 678 124 PaeTec Communications, Inc.
7545 1815 301 88 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
6389 3117 2986 bellsouth.net, inc.
17974 2484 2430 PT TELEKOMUNIKASI INDONESIA
28573 2266 2196 NET Servicos de Comunicao S.A
10620 2270 2063 TVCABLE BOGOTA
4766 2946 2032 Korea Telecom (KIX)
18566 2081 1901 Covad Communications
22773 1950 1819 Cox Communications, Inc.
1785 1941 1817 PaeTec Communications, Inc.
7545 1815 1727 TPG Internet Pty Ltd
8402 1689 1673 Corbina telecom

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
128.0.24.0/21 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
128.0.106.0/24 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
27.112.114.0/24 23884 Proimage Engineering and Comm
31.210.16.0/22 15657 Neural Networks ASN
41.222.80.0/21 37110 Moztel LDA
41.223.108.0/22 36966 >>UNKNOWN<<
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
64.66.32.0/20 18864 >>UNKNOWN<<
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 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 /8:18 /9:13 /10:29 /11:87 /12:244
/13:478 /14:859 /15:1546 /16:12490 /17:6565 /18:10944
/19:21628 /20:31077 /21:33051 /22:44367 /23:40816 /24:230203
/25:1304 /26:1689 /27:872 /28:179 /29:80 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 2724 3455 Windstream Communications Inc
18566 2031 2081 Covad Communications
6389 1773 3117 bellsouth.net, inc.
8402 1412 1689 Corbina telecom
22773 1281 1950 Cox Communications, Inc.
30036 1263 1358 Mediacom Communications Corp
11492 1157 1194 Cable One
1785 1023 1941 PaeTec Communications, Inc.
6503 980 1454 AVANTEL, S.A.
7011 954 1206 Citizens Utilities

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

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

1:701 2:679 3:3 4:13 5:703 6:3
8:470 12:1931 13:3 14:698 15:11 16:3
17:6 20:27 23:221 24:1794 27:1465 31:1351
32:54 33:2 34:2 36:11 37:1152 38:842
39:2 40:141 41:2643 42:180 44:3 46:1730
47:3 49:527 50:657 52:12 54:28 55:8
56:1 57:28 58:1074 59:561 60:237 61:1316
62:1040 63:2016 64:4350 65:2198 66:4501 67:2087
68:1198 69:3331 70:939 71:555 72:1891 74:2622
75:475 76:294 77:1051 78:1030 79:526 80:1220
81:982 82:661 83:538 84:527 85:1164 86:457
87:970 88:362 89:1759 90:304 91:5382 92:612
93:1620 94:1988 95:1599 96:489 97:337 98:965
99:40 100:31 101:290 103:1960 105:501 106:125
107:203 108:510 109:1754 110:829 111:985 112:464
113:743 114:645 115:905 116:896 117:771 118:972
119:1263 120:372 121:707 122:1716 123:1172 124:1320
125:1301 128:812 129:199 130:308 131:645 132:319
133:142 134:254 135:62 136:216 137:235 138:343
139:170 140:182 141:299 142:516 143:352 144:491
145:89 146:518 147:324 148:731 149:335 150:157
151:240 152:399 153:188 154:23 155:443 156:231
157:377 158:257 159:681 160:335 161:421 162:371
163:193 164:580 165:458 166:464 167:569 168:1007
169:131 170:989 171:164 172:4 173:1642 174:767
175:465 176:946 177:1501 178:1716 180:1360 181:189
182:1146 183:289 184:651 185:151 186:2151 187:1436
188:1911 189:1563 190:6206 192:6091 193:5721 194:4490
195:3610 196:1256 197:289 198:4016 199:5158 200:6030
201:2027 202:8849 203:8755 204:4474 205:2543 206:2810
207:2810 208:4060 209:3659 210:2902 211:1560 212:2002
213:1884 214:860 215:89 216:5137 217:1569 218:596
219:323 220:1260 221:544 222:324 223:380

End of report
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