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, July 16, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 17 Jul, 2012

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

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

BGP routing table entries examined: 416975
Prefixes after maximum aggregation: 176009
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 203249
Total ASes present in the Internet Routing Table: 41529
Prefixes per ASN: 10.04
Origin-only ASes present in the Internet Routing Table: 33324
Origin ASes announcing only one prefix: 15697
Transit ASes present in the Internet Routing Table: 5586
Transit-only ASes present in the Internet Routing Table: 135
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 31
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 400
Unregistered ASNs in the Routing Table: 130
Number of 32-bit ASNs allocated by the RIRs: 2996
Number of 32-bit ASNs visible in the Routing Table: 2619
Prefixes from 32-bit ASNs in the Routing Table: 6785
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 163
Number of addresses announced to Internet: 2565764908
Equivalent to 152 /8s, 238 /16s and 119 /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: 144529

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

Prefixes being announced by APNIC Region ASes: 101970
Total APNIC prefixes after maximum aggregation: 32805
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 102434
Unique aggregates announced from the APNIC address blocks: 42120
APNIC Region origin ASes present in the Internet Routing Table: 4719
APNIC Prefixes per ASN: 21.71
APNIC Region origin ASes announcing only one prefix: 1249
APNIC Region transit ASes present in the Internet Routing Table: 743
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: 248
Number of APNIC addresses announced to Internet: 704413824
Equivalent to 41 /8s, 252 /16s and 128 /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: 152747
Total ARIN prefixes after maximum aggregation: 77466
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153790
Unique aggregates announced from the ARIN address blocks: 68643
ARIN Region origin ASes present in the Internet Routing Table: 15183
ARIN Prefixes per ASN: 10.13
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: 1071336576
Equivalent to 63 /8s, 219 /16s and 76 /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: 103708
Total RIPE prefixes after maximum aggregation: 55188
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 105900
Unique aggregates announced from the RIPE address blocks: 67209
RIPE Region origin ASes present in the Internet Routing Table: 16674
RIPE Prefixes per ASN: 6.35
RIPE Region origin ASes announcing only one prefix: 8084
RIPE Region transit ASes present in the Internet Routing Table: 2712
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: 1723
Number of RIPE addresses announced to Internet: 636292740
Equivalent to 37 /8s, 237 /16s and 14 /24s
Percentage of available RIPE address space announced: 92.5

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: 42481
Total LACNIC prefixes after maximum aggregation: 8359
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 45169
Unique aggregates announced from the LACNIC address blocks: 21795
LACNIC Region origin ASes present in the Internet Routing Table: 1609
LACNIC Prefixes per ASN: 28.07
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: 625
Number of LACNIC addresses announced to Internet: 112277672
Equivalent to 6 /8s, 177 /16s and 56 /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: 9086
Total AfriNIC prefixes after maximum aggregation: 2137
AfriNIC Deaggregation factor: 4.25
Prefixes being announced from the AfriNIC address blocks: 9519
Unique aggregates announced from the AfriNIC address blocks: 3345
AfriNIC Region origin ASes present in the Internet Routing Table: 557
AfriNIC Prefixes per ASN: 17.09
AfriNIC Region origin ASes announcing only one prefix: 177
AfriNIC Region transit ASes present in the Internet Routing Table: 122
Average AfriNIC Region AS path length visible: 4.4
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: 41018624
Equivalent to 2 /8s, 113 /16s and 229 /24s
Percentage of available AfriNIC address space announced: 40.7

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 2738 11122 1241 Korea Telecom (KIX)
17974 2220 558 80 PT TELEKOMUNIKASI INDONESIA
7545 1687 301 87 TPG Internet Pty Ltd
4755 1613 388 162 TATA Communications formerly
9829 1303 1085 28 BSNL National Internet Backbo
9583 1162 88 508 Sify Limited
7552 1128 1062 11 Vietel Corporation
4808 1117 2053 318 CNCGROUP IP network: China169
24560 1035 385 167 Bharti Airtel Ltd., Telemedia
9498 979 291 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
7029 3439 998 177 Windstream Communications Inc
6389 3388 3773 186 bellsouth.net, inc.
18566 2088 382 181 Covad Communications
1785 1937 681 131 PaeTec Communications, Inc.
22773 1666 2911 121 Cox Communications, Inc.
20115 1649 1571 615 Charter Communications
4323 1574 1043 383 Time Warner Telecom
30036 1390 270 782 Mediacom Communications Corp
7018 1260 10040 824 AT&T WorldNet Services
7011 1200 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 1659 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 502 100 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 1999 1214 55 NET Servicos de Comunicao S.A
10620 1990 346 208 TVCABLE BOGOTA
6503 1521 418 64 AVANTEL, S.A.
8151 1465 3044 345 UniNet S.A. de C.V.
7303 1454 934 194 Telecom Argentina Stet-France
6458 852 81 15 GUATEL
27947 714 73 93 Telconet S.A
11172 643 91 74 Servicios Alestra S.A de C.V
3816 593 249 92 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 1089 958 13 TEDATA
24863 864 274 32 LINKdotNET AS number
6713 509 650 19 Itissalat Al-MAGHRIB
24835 286 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 159 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
7029 3439 998 177 Windstream Communications Inc
6389 3388 3773 186 bellsouth.net, inc.
4766 2738 11122 1241 Korea Telecom (KIX)
17974 2220 558 80 PT TELEKOMUNIKASI INDONESIA
18566 2088 382 181 Covad Communications
28573 1999 1214 55 NET Servicos de Comunicao S.A
10620 1990 346 208 TVCABLE BOGOTA
1785 1937 681 131 PaeTec Communications, Inc.
7545 1687 301 87 TPG Internet Pty Ltd
22773 1666 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
6389 3388 3202 bellsouth.net, inc.
17974 2220 2140 PT TELEKOMUNIKASI INDONESIA
28573 1999 1944 NET Servicos de Comunicao S.A
18566 2088 1907 Covad Communications
1785 1937 1806 PaeTec Communications, Inc.
10620 1990 1782 TVCABLE BOGOTA
8402 1659 1643 Corbina telecom
7545 1687 1600 TPG Internet Pty Ltd
22773 1666 1545 Cox Communications, Inc.
4766 2738 1497 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
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
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

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
5.149.112.0/21 23456 32-bit ASN transition
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

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 /17:6365 /18:10785
/19:20880 /20:29775 /21:31567 /22:41199 /23:39300 /24:217757
/25:1234 /26:1488 /27:859 /28:165 /29:61 /30:18
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2772 3439 Windstream Communications Inc
18566 2038 2088 Covad Communications
6389 1868 3388 bellsouth.net, inc.
8402 1354 1659 Corbina telecom
30036 1325 1390 Mediacom Communications Corp
11492 1154 1191 Cable One
22773 1097 1666 Cox Communications, Inc.
6503 1051 1521 AVANTEL, S.A.
1785 1044 1937 PaeTec Communications, Inc.
7011 937 1200 Citizens Utilities

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

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

1:577 2:755 3:1 4:13 5:130 6:3
8:436 12:2010 13:1 14:635 15:12 16:3
17:5 20:24 23:188 24:1794 27:1333 31:1013
32:56 33:2 34:2 36:8 37:619 38:824
39:1 40:128 41:2916 42:141 44:3 46:1522
47:2 49:431 50:553 52:13 54:14 55:7
56:1 57:33 58:980 59:528 60:242 61:1337
62:922 63:2035 64:4238 65:2237 66:4499 67:2009
68:1157 69:3201 70:986 71:512 72:1874 74:2611
75:488 76:335 77:934 78:913 79:491 80:1224
81:945 82:644 83:533 84:499 85:1161 86:422
87:932 88:356 89:1674 90:303 91:5031 92:584
93:1299 94:1559 95:1248 96:377 97:322 98:895
99:39 100:21 101:257 103:1263 106:115 107:189
108:376 109:1463 110:792 111:938 112:429 113:647
114:656 115:906 116:920 117:731 118:899 119:1223
120:356 121:798 122:1661 123:1165 124:1379 125:1254
128:555 129:186 130:267 131:634 132:300 133:22
134:246 135:60 136:218 137:239 138:334 139:177
140:494 141:245 142:431 143:374 144:476 145:77
146:514 147:283 148:768 149:317 150:151 151:185
152:476 153:176 154:17 155:432 156:222 157:382
158:190 159:622 160:342 161:274 162:380 163:192
164:674 165:413 166:589 167:533 168:915 169:126
170:897 171:146 172:5 173:1730 174:607 175:436
176:563 177:951 178:1589 180:1308 181:104 182:990
183:233 184:540 186:2001 187:1089 188:1351 189:1591
190:6060 192:6009 193:5531 194:4485 195:3231 196:1206
197:169 198:3677 199:4925 200:5947 201:1970 202:8689
203:8659 204:4387 205:2537 206:2811 207:2832 208:4040
209:3632 210:2772 211:1564 212:1968 213:1819 214:872
215:83 216:5093 217:1552 218:558 219:339 220:1226
221:569 222:336 223:347

End of report
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