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.

Sunday, November 4, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 05 Nov, 2012

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

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

BGP routing table entries examined: 429789
Prefixes after maximum aggregation: 179537
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 211444
Total ASes present in the Internet Routing Table: 42431
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33699
Origin ASes announcing only one prefix: 15776
Transit ASes present in the Internet Routing Table: 5674
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: 40
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 961
Unregistered ASNs in the Routing Table: 343
Number of 32-bit ASNs allocated by the RIRs: 3443
Number of 32-bit ASNs visible in the Routing Table: 3058
Prefixes from 32-bit ASNs in the Routing Table: 8286
Special use prefixes present in the Routing Table: 14
Prefixes being announced from unallocated address space: 158
Number of addresses announced to Internet: 2611149548
Equivalent to 155 /8s, 162 /16s and 250 /24s
Percentage of available address space announced: 70.5
Percentage of allocated address space announced: 70.5
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: 150822

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

Prefixes being announced by APNIC Region ASes: 103948
Total APNIC prefixes after maximum aggregation: 32552
APNIC Deaggregation factor: 3.19
Prefixes being announced from the APNIC address blocks: 104728
Unique aggregates announced from the APNIC address blocks: 43024
APNIC Region origin ASes present in the Internet Routing Table: 4786
APNIC Prefixes per ASN: 21.88
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 781
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 345
Number of APNIC addresses announced to Internet: 713598112
Equivalent to 42 /8s, 136 /16s and 164 /24s
Percentage of available APNIC address space announced: 83.4

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: 155001
Total ARIN prefixes after maximum aggregation: 78335
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155852
Unique aggregates announced from the ARIN address blocks: 69700
ARIN Region origin ASes present in the Internet Routing Table: 15228
ARIN Prefixes per ASN: 10.23
ARIN Region origin ASes announcing only one prefix: 5753
ARIN Region transit ASes present in the Internet Routing Table: 1603
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1087603072
Equivalent to 64 /8s, 211 /16s and 129 /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: 108495
Total RIPE prefixes after maximum aggregation: 57637
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 111170
Unique aggregates announced from the RIPE address blocks: 72241
RIPE Region origin ASes present in the Internet Routing Table: 16922
RIPE Prefixes per ASN: 6.57
RIPE Region origin ASes announcing only one prefix: 8138
RIPE Region transit ASes present in the Internet Routing Table: 2743
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1986
Number of RIPE addresses announced to Internet: 648602020
Equivalent to 38 /8s, 168 /16s and 225 /24s
Percentage of available RIPE address space announced: 94.3

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: 44337
Total LACNIC prefixes after maximum aggregation: 8734
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 47786
Unique aggregates announced from the LACNIC address blocks: 22881
LACNIC Region origin ASes present in the Internet Routing Table: 1697
LACNIC Prefixes per ASN: 28.16
LACNIC Region origin ASes announcing only one prefix: 477
LACNIC Region transit ASes present in the Internet Routing Table: 326
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 704
Number of LACNIC addresses announced to Internet: 118397224
Equivalent to 7 /8s, 14 /16s and 153 /24s
Percentage of available LACNIC address space announced: 70.6

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: 9606
Total AfriNIC prefixes after maximum aggregation: 2226
AfriNIC Deaggregation factor: 4.32
Prefixes being announced from the AfriNIC address blocks: 10095
Unique aggregates announced from the AfriNIC address blocks: 3464
AfriNIC Region origin ASes present in the Internet Routing Table: 564
AfriNIC Prefixes per ASN: 17.90
AfriNIC Region origin ASes announcing only one prefix: 168
AfriNIC Region transit ASes present in the Internet Routing Table: 126
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: 42639872
Equivalent to 2 /8s, 138 /16s and 162 /24s
Percentage of available AfriNIC address space announced: 42.4

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 2965 11558 900 Korea Telecom (KIX)
17974 2430 829 54 PT TELEKOMUNIKASI INDONESIA
7545 1801 301 88 TPG Internet Pty Ltd
4755 1616 375 158 TATA Communications formerly
9829 1407 1154 41 BSNL National Internet Backbo
9583 1190 88 508 Sify Limited
4808 1111 2056 315 CNCGROUP IP network: China169
7552 1107 1062 11 Vietel Corporation
24560 1034 385 161 Bharti Airtel Ltd., Telemedia
9498 1018 310 73 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
7029 3201 991 189 Windstream Communications Inc
6389 3169 3723 161 bellsouth.net, inc.
18566 2084 382 180 Covad Communications
22773 1971 2931 129 Cox Communications, Inc.
1785 1927 678 128 PaeTec Communications, Inc.
20115 1667 1585 628 Charter Communications
4323 1592 1153 392 Time Warner Telecom
30036 1353 274 748 Mediacom Communications Corp
7018 1266 10289 845 AT&T WorldNet Services
7011 1222 334 692 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 1783 544 16 Corbina telecom
12479 851 776 64 Uni2 Autonomous System
34984 824 207 197 BILISIM TELEKOM
31148 726 37 9 FreeNet ISP
13188 720 93 137 Educational Network
6830 715 2313 438 UPC Distribution Services
20940 706 225 545 Akamai Technologies European
58113 601 66 364 LIR DATACENTER TELECOM SRL
8551 593 364 61 Bezeq International
3320 497 8440 407 Deutsche Telekom AG

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 2229 381 238 TVCABLE BOGOTA
28573 2152 1281 63 NET Servicos de Comunicao S.A
7303 1669 1139 202 Telecom Argentina Stet-France
8151 1598 3023 355 UniNet S.A. de C.V.
6503 1538 435 67 AVANTEL, S.A.
27947 747 77 91 Telconet S.A
3816 657 309 69 Empresa Nacional de Telecomun
14420 593 90 106 CORPORACION NACIONAL DE TELEC
11172 589 85 65 Servicios Alestra S.A de C.V
7738 582 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 896 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 552 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 287 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 172 697 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 3201 991 189 Windstream Communications Inc
6389 3169 3723 161 bellsouth.net, inc.
4766 2965 11558 900 Korea Telecom (KIX)
17974 2430 829 54 PT TELEKOMUNIKASI INDONESIA
10620 2229 381 238 TVCABLE BOGOTA
28573 2152 1281 63 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
22773 1971 2931 129 Cox Communications, Inc.
1785 1927 678 128 PaeTec Communications, Inc.
7545 1801 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 3169 3008 bellsouth.net, inc.
17974 2430 2376 PT TELEKOMUNIKASI INDONESIA
28573 2152 2089 NET Servicos de Comunicao S.A
4766 2965 2065 Korea Telecom (KIX)
10620 2229 1991 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
22773 1971 1842 Cox Communications, Inc.
1785 1927 1799 PaeTec Communications, Inc.
8402 1783 1767 Corbina telecom
7545 1801 1713 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
59530 UNALLOCATED 5.8.182.0/24 31261 GARS Telecom
61408 UNALLOCATED 5.56.0.0/21 174 Cogent Communication
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

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
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition

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 /11:88 /12:243
/13:478 /14:850 /15:1548 /16:12452 /17:6542 /18:10884
/19:21261 /20:30647 /21:32626 /22:43139 /23:40304 /24:224409
/25:1357 /26:1698 /27:905 /28:177 /29:78 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2642 3201 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1786 3169 bellsouth.net, inc.
8402 1485 1783 Corbina telecom
22773 1300 1971 Cox Communications, Inc.
30036 1270 1353 Mediacom Communications Corp
11492 1152 1187 Cable One
6503 1054 1538 AVANTEL, S.A.
1785 1017 1927 PaeTec Communications, Inc.
7011 957 1222 Citizens Utilities

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

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

1:645 2:797 3:1 4:13 5:615 6:3
8:474 12:1955 13:3 14:685 15:11 16:3
17:6 20:27 23:212 24:1812 27:1379 31:1010
32:54 33:2 34:2 36:7 37:911 38:820
39:2 40:137 41:2691 42:177 44:3 46:1625
47:2 49:466 50:601 52:12 54:27 55:6
56:3 57:27 58:984 59:544 60:237 61:1292
62:948 63:2008 64:4253 65:2199 66:4484 67:2096
68:1158 69:3229 70:935 71:505 72:1885 74:2611
75:479 76:267 77:980 78:1001 79:510 80:1236
81:981 82:620 83:541 84:528 85:1151 86:494
87:941 88:358 89:1738 90:306 91:5284 92:581
93:1390 94:1702 95:1290 96:411 97:324 98:975
99:39 100:31 101:292 103:1737 105:514 106:120
107:200 108:478 109:1625 110:833 111:978 112:434
113:716 114:669 115:868 116:889 117:765 118:955
119:1227 120:361 121:694 122:1692 123:1160 124:1344
125:1288 128:577 129:200 130:287 131:663 132:313
133:142 134:252 135:62 136:229 137:244 138:336
139:176 140:497 141:292 142:493 143:378 144:498
145:82 146:524 147:269 148:730 149:328 150:159
151:207 152:450 153:183 154:21 155:439 156:226
157:365 158:286 159:671 160:332 161:414 162:368
163:191 164:708 165:449 166:515 167:560 168:999
169:129 170:917 171:154 172:6 173:1715 174:637
175:456 176:737 177:1385 178:1619 180:1375 181:163
182:1107 183:300 184:619 185:50 186:2248 187:1405
188:1713 189:1601 190:5938 192:6041 193:5403 194:4127
195:3450 196:1226 197:251 198:3884 199:5087 200:6010
201:1968 202:8682 203:8726 204:4408 205:2533 206:2751
207:2815 208:4055 209:3619 210:2831 211:1533 212:2085
213:1844 214:894 215:75 216:5145 217:1575 218:577
219:308 220:1256 221:529 222:337 223:404

End of report
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