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, July 15, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 416436
Prefixes after maximum aggregation: 175960
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 202941
Total ASes present in the Internet Routing Table: 41502
Prefixes per ASN: 10.03
Origin-only ASes present in the Internet Routing Table: 33309
Origin ASes announcing only one prefix: 15677
Transit ASes present in the Internet Routing Table: 5581
Transit-only ASes present in the Internet Routing Table: 134
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 30
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 400
Unregistered ASNs in the Routing Table: 131
Number of 32-bit ASNs allocated by the RIRs: 2990
Number of 32-bit ASNs visible in the Routing Table: 2612
Prefixes from 32-bit ASNs in the Routing Table: 6775
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 162
Number of addresses announced to Internet: 2565089580
Equivalent to 152 /8s, 228 /16s and 41 /24s
Percentage of available address space announced: 69.2
Percentage of allocated address space announced: 69.3
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.0
Total number of prefixes smaller than registry allocations: 144209

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

Prefixes being announced by APNIC Region ASes: 101972
Total APNIC prefixes after maximum aggregation: 32787
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 102422
Unique aggregates announced from the APNIC address blocks: 42125
APNIC Region origin ASes present in the Internet Routing Table: 4719
APNIC Prefixes per ASN: 21.70
APNIC Region origin ASes announcing only one prefix: 1245
APNIC Region transit ASes present in the Internet Routing Table: 745
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: 245
Number of APNIC addresses announced to Internet: 704264832
Equivalent to 41 /8s, 250 /16s and 58 /24s
Percentage of available APNIC address space announced: 82.3

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: 152482
Total ARIN prefixes after maximum aggregation: 77460
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153513
Unique aggregates announced from the ARIN address blocks: 68493
ARIN Region origin ASes present in the Internet Routing Table: 15188
ARIN Prefixes per ASN: 10.11
ARIN Region origin ASes announcing only one prefix: 5757
ARIN Region transit ASes present in the Internet Routing Table: 1614
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1071275136
Equivalent to 63 /8s, 218 /16s and 92 /24s
Percentage of available ARIN address space announced: 56.7

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: 103493
Total RIPE prefixes after maximum aggregation: 55167
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 105726
Unique aggregates announced from the RIPE address blocks: 67085
RIPE Region origin ASes present in the Internet Routing Table: 16654
RIPE Prefixes per ASN: 6.35
RIPE Region origin ASes announcing only one prefix: 8074
RIPE Region transit ASes present in the Internet Routing Table: 2704
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: 1720
Number of RIPE addresses announced to Internet: 635626628
Equivalent to 37 /8s, 226 /16s and 228 /24s
Percentage of available RIPE address space announced: 92.4

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: 42491
Total LACNIC prefixes after maximum aggregation: 8355
LACNIC Deaggregation factor: 5.09
Prefixes being announced from the LACNIC address blocks: 45186
Unique aggregates announced from the LACNIC address blocks: 21777
LACNIC Region origin ASes present in the Internet Routing Table: 1611
LACNIC Prefixes per ASN: 28.05
LACNIC Region origin ASes announcing only one prefix: 430
LACNIC Region transit ASes present in the Internet Routing Table: 307
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: 624
Number of LACNIC addresses announced to Internet: 112311464
Equivalent to 6 /8s, 177 /16s and 188 /24s
Percentage of available LACNIC address space announced: 66.9

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: 9025
Total AfriNIC prefixes after maximum aggregation: 2137
AfriNIC Deaggregation factor: 4.22
Prefixes being announced from the AfriNIC address blocks: 9427
Unique aggregates announced from the AfriNIC address blocks: 3325
AfriNIC Region origin ASes present in the Internet Routing Table: 551
AfriNIC Prefixes per ASN: 17.11
AfriNIC Region origin ASes announcing only one prefix: 171
AfriNIC Region transit ASes present in the Internet Routing Table: 125
Average AfriNIC Region AS path length visible: 4.5
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: 41188096
Equivalent to 2 /8s, 116 /16s and 123 /24s
Percentage of available AfriNIC address space announced: 40.9

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 2732 11119 1236 Korea Telecom (KIX)
17974 2217 558 80 PT TELEKOMUNIKASI INDONESIA
7545 1691 301 87 TPG Internet Pty Ltd
4755 1614 388 162 TATA Communications formerly
9829 1303 1085 28 BSNL National Internet Backbo
9583 1167 88 505 Sify Limited
7552 1128 1062 11 Vietel Corporation
4808 1117 2053 318 CNCGROUP IP network: China169
24560 1037 385 165 Bharti Airtel Ltd., Telemedia
9498 981 291 67 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 3388 3773 186 bellsouth.net, inc.
7029 3340 998 177 Windstream Communications Inc
18566 2088 382 181 Covad Communications
1785 1935 680 130 PaeTec Communications, Inc.
22773 1664 2911 121 Cox Communications, Inc.
20115 1649 1571 615 Charter Communications
4323 1575 1043 384 Time Warner Telecom
30036 1390 270 782 Mediacom Communications Corp
7018 1261 10044 825 AT&T WorldNet Services
7011 1197 320 696 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 1631 544 16 Corbina telecom
2118 1023 97 14 EUnet/RELCOM Autonomous Syste
12479 796 741 94 Uni2 Autonomous System
34984 728 189 174 BILISIM TELEKOM
6830 709 2292 443 UPC Distribution Services
31148 704 37 9 FreeNet ISP
20940 684 220 531 Akamai Technologies European
8551 578 364 61 Bezeq International
13188 555 100 10 Educational Network
3320 500 8443 410 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
28573 2007 1214 55 NET Servicos de Comunicao S.A
10620 1990 346 208 TVCABLE BOGOTA
6503 1522 418 66 AVANTEL, S.A.
8151 1464 3044 345 UniNet S.A. de C.V.
7303 1454 934 194 Telecom Argentina Stet-France
6458 854 81 15 GUATEL
27947 714 73 93 Telconet S.A
11172 643 91 74 Servicios Alestra S.A de C.V
3816 588 246 89 Empresa Nacional de Telecomun
22047 583 326 15 VTR PUNTO NET 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
8452 1106 958 13 TEDATA
24863 863 274 32 LINKdotNET AS number
6713 508 649 18 Itissalat Al-MAGHRIB
24835 285 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 169 664 86 MTN Network Solutions
15706 159 32 6 Sudatel Internet Exchange Aut
29571 158 15 15 Ci Telecom Autonomous system

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 3388 3773 186 bellsouth.net, inc.
7029 3340 998 177 Windstream Communications Inc
4766 2732 11119 1236 Korea Telecom (KIX)
17974 2217 558 80 PT TELEKOMUNIKASI INDONESIA
18566 2088 382 181 Covad Communications
28573 2007 1214 55 NET Servicos de Comunicao S.A
10620 1990 346 208 TVCABLE BOGOTA
1785 1935 680 130 PaeTec Communications, Inc.
7545 1691 301 87 TPG Internet Pty Ltd
22773 1664 2911 121 Cox Communications, Inc.

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 3340 3163 Windstream Communications Inc
17974 2217 2137 PT TELEKOMUNIKASI INDONESIA
28573 2007 1952 NET Servicos de Comunicao S.A
18566 2088 1907 Covad Communications
1785 1935 1805 PaeTec Communications, Inc.
10620 1990 1782 TVCABLE BOGOTA
8402 1631 1615 Corbina telecom
7545 1691 1604 TPG Internet Pty Ltd
22773 1664 1543 Cox Communications, Inc.
4766 2732 1496 Korea Telecom (KIX)

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
25639 UNALLOCATED 12.41.169.0/24 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 7018 AT&T WorldNet Servic
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
29760 UNALLOCATED 12.145.34.0/23 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
198.18.0.0/15 14744 Internap Network Services

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
41.222.80.0/21 37110 Moztel LDA

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 /8:19 /9:12 /10:28 /11:82 /12:236
/13:471 /14:843 /15:1520 /16:12288 /17:6364 /18:10783
/19:20870 /20:29725 /21:31551 /22:41196 /23:39211 /24:217392
/25:1235 /26:1486 /27:858 /28:164 /29:61 /30:18
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2675 3340 Windstream Communications Inc
18566 2038 2088 Covad Communications
6389 1868 3388 bellsouth.net, inc.
8402 1326 1631 Corbina telecom
30036 1325 1390 Mediacom Communications Corp
11492 1154 1191 Cable One
22773 1095 1664 Cox Communications, Inc.
6503 1051 1522 AVANTEL, S.A.
1785 1043 1935 PaeTec Communications, Inc.
7011 934 1197 Citizens Utilities

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

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

1:576 2:733 3:1 4:13 5:127 6:3
8:435 12:2010 13:1 14:634 15:12 16:3
17:5 20:24 23:188 24:1794 27:1330 31:1012
32:56 33:2 34:2 36:8 37:608 38:823
39:1 40:128 41:2884 42:141 44:3 46:1525
47:2 49:430 50:553 52:13 54:14 55:7
56:1 57:34 58:982 59:528 60:246 61:1335
62:923 63:2037 64:4237 65:2237 66:4496 67:2009
68:1156 69:3196 70:983 71:512 72:1873 74:2600
75:479 76:335 77:924 78:912 79:492 80:1223
81:942 82:652 83:523 84:499 85:1129 86:422
87:889 88:357 89:1675 90:303 91:5016 92:581
93:1287 94:1563 95:1234 96:376 97:321 98:889
99:39 100:21 101:257 103:1260 106:115 107:189
108:376 109:1462 110:788 111:937 112:427 113:647
114:654 115:907 116:921 117:730 118:899 119:1220
120:349 121:798 122:1662 123:1163 124:1379 125:1253
128:555 129:186 130:268 131:633 132:295 133:22
134:246 135:61 136:218 137:238 138:334 139:177
140:493 141:245 142:431 143:373 144:475 145:77
146:518 147:283 148:769 149:317 150:151 151:185
152:476 153:176 154:17 155:432 156:221 157:382
158:190 159:625 160:343 161:273 162:380 163:192
164:674 165:413 166:589 167:533 168:915 169:125
170:897 171:146 172:5 173:1726 174:601 175:419
176:555 177:959 178:1604 180:1305 181:104 182:990
183:233 184:541 186:1990 187:1088 188:1367 189:1592
190:6079 192:6009 193:5528 194:4481 195:3226 196:1199
197:165 198:3676 199:4862 200:5955 201:1991 202:8702
203:8684 204:4386 205:2538 206:2809 207:2772 208:4039
209:3626 210:2790 211:1564 212:1950 213:1819 214:869
215:83 216:5078 217:1544 218:558 219:339 220:1228
221:569 222:337 223:347

End of report
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