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 2, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 03 Jul, 2012

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

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

BGP routing table entries examined: 414103
Prefixes after maximum aggregation: 175290
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 202154
Total ASes present in the Internet Routing Table: 41352
Prefixes per ASN: 10.01
Origin-only ASes present in the Internet Routing Table: 33275
Origin ASes announcing only one prefix: 15656
Transit ASes present in the Internet Routing Table: 5544
Transit-only ASes present in the Internet Routing Table: 131
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 27
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 390
Unregistered ASNs in the Routing Table: 127
Number of 32-bit ASNs allocated by the RIRs: 2924
Number of 32-bit ASNs visible in the Routing Table: 2533
Prefixes from 32-bit ASNs in the Routing Table: 6580
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 155
Number of addresses announced to Internet: 2571220644
Equivalent to 153 /8s, 65 /16s and 182 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.5
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.1
Total number of prefixes smaller than registry allocations: 143369

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

Prefixes being announced by APNIC Region ASes: 101177
Total APNIC prefixes after maximum aggregation: 32703
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101631
Unique aggregates announced from the APNIC address blocks: 42026
APNIC Region origin ASes present in the Internet Routing Table: 4711
APNIC Prefixes per ASN: 21.57
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 749
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 241
Number of APNIC addresses announced to Internet: 703287168
Equivalent to 41 /8s, 235 /16s and 79 /24s
Percentage of available APNIC address space announced: 82.2

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: 152121
Total ARIN prefixes after maximum aggregation: 77274
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153062
Unique aggregates announced from the ARIN address blocks: 68322
ARIN Region origin ASes present in the Internet Routing Table: 15168
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 5746
ARIN Region transit ASes present in the Internet Routing Table: 1600
Average ARIN Region AS path length visible: 4.0
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: 1081036416
Equivalent to 64 /8s, 111 /16s and 78 /24s
Percentage of available ARIN address space announced: 57.2

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: 103080
Total RIPE prefixes after maximum aggregation: 54855
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 105263
Unique aggregates announced from the RIPE address blocks: 66761
RIPE Region origin ASes present in the Internet Routing Table: 16618
RIPE Prefixes per ASN: 6.33
RIPE Region origin ASes announcing only one prefix: 8062
RIPE Region transit ASes present in the Internet Routing Table: 2687
Average RIPE Region AS path length visible: 4.9
Max RIPE Region AS path length visible: 27
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1664
Number of RIPE addresses announced to Internet: 634397444
Equivalent to 37 /8s, 208 /16s and 35 /24s
Percentage of available RIPE address space announced: 92.2

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: 41590
Total LACNIC prefixes after maximum aggregation: 8243
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 44180
Unique aggregates announced from the LACNIC address blocks: 21649
LACNIC Region origin ASes present in the Internet Routing Table: 1607
LACNIC Prefixes per ASN: 27.49
LACNIC Region origin ASes announcing only one prefix: 435
LACNIC Region transit ASes present in the Internet Routing Table: 307
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 605
Number of LACNIC addresses announced to Internet: 111690912
Equivalent to 6 /8s, 168 /16s and 68 /24s
Percentage of available LACNIC address space announced: 66.6

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: 9359
Total AfriNIC prefixes after maximum aggregation: 2161
AfriNIC Deaggregation factor: 4.33
Prefixes being announced from the AfriNIC address blocks: 9812
Unique aggregates announced from the AfriNIC address blocks: 3262
AfriNIC Region origin ASes present in the Internet Routing Table: 551
AfriNIC Prefixes per ASN: 17.81
AfriNIC Region origin ASes announcing only one prefix: 174
AfriNIC Region transit ASes present in the Internet Routing Table: 123
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: 40513280
Equivalent to 2 /8s, 106 /16s and 47 /24s
Percentage of available AfriNIC address space announced: 40.2

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 2702 11118 1206 Korea Telecom (KIX)
17974 1963 541 78 PT TELEKOMUNIKASI INDONESIA
7545 1689 301 87 TPG Internet Pty Ltd
4755 1596 386 154 TATA Communications formerly
9829 1304 1085 28 BSNL National Internet Backbo
9583 1169 88 509 Sify Limited
4808 1109 2052 314 CNCGROUP IP network: China169
7552 1100 1062 11 Vietel Corporation
24560 1035 385 165 Bharti Airtel Ltd., Telemedia
9498 973 291 65 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 3394 3789 187 bellsouth.net, inc.
7029 3197 986 157 Windstream Communications Inc
18566 2090 382 180 Covad Communications
1785 1930 681 132 PaeTec Communications, Inc.
22773 1656 2911 121 Cox Communications, Inc.
20115 1651 1573 616 Charter Communications
4323 1575 1043 384 Time Warner Telecom
30036 1441 271 751 Mediacom Communications Corp
7018 1252 10028 820 AT&T WorldNet Services
7011 1173 316 683 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 1722 544 16 Corbina telecom
2118 1288 97 14 EUnet/RELCOM Autonomous Syste
12479 782 731 92 Uni2 Autonomous System
34984 718 189 175 BILISIM TELEKOM
6830 690 2234 438 UPC Distribution Services
31148 690 37 9 FreeNet ISP
20940 663 209 513 Akamai Technologies European
8551 580 364 61 Bezeq International
13188 504 100 10 Educational Network
3320 496 8443 408 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 1983 345 204 TVCABLE BOGOTA
28573 1931 1213 54 NET Servicos de Comunicao S.A
6503 1524 418 65 AVANTEL, S.A.
7303 1455 933 193 Telecom Argentina Stet-France
8151 1375 3066 343 UniNet S.A. de C.V.
27947 688 74 94 Telconet S.A
11172 639 91 74 Servicios Alestra S.A de C.V
3816 590 246 90 Empresa Nacional de Telecomun
22047 583 326 15 VTR PUNTO NET S.A.
14117 567 65 59 Telefonica del Sur 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 1268 958 13 TEDATA
24863 867 274 35 LINKdotNET AS number
6713 500 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 210 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
29571 173 16 9 Ci Telecom Autonomous system
16637 169 664 87 MTN Network Solutions
29975 167 571 19 Vodacom

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 3394 3789 187 bellsouth.net, inc.
7029 3197 986 157 Windstream Communications Inc
4766 2702 11118 1206 Korea Telecom (KIX)
18566 2090 382 180 Covad Communications
10620 1983 345 204 TVCABLE BOGOTA
17974 1963 541 78 PT TELEKOMUNIKASI INDONESIA
28573 1931 1213 54 NET Servicos de Comunicao S.A
1785 1930 681 132 PaeTec Communications, Inc.
8402 1722 544 16 Corbina telecom
7545 1689 301 87 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
7029 3197 3040 Windstream Communications Inc
18566 2090 1910 Covad Communications
17974 1963 1885 PT TELEKOMUNIKASI INDONESIA
28573 1931 1877 NET Servicos de Comunicao S.A
1785 1930 1798 PaeTec Communications, Inc.
10620 1983 1779 TVCABLE BOGOTA
8402 1722 1706 Corbina telecom
7545 1689 1602 TPG Internet Pty Ltd
22773 1656 1535 Cox Communications, Inc.
4766 2702 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
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project

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

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

Network Origin AS Description
5.104.240.0/21 20645 PurePeak Limited
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 /9:13 /10:28 /11:83 /12:236
/13:464 /14:839 /15:1515 /16:12282 /17:6348 /18:10758
/19:20861 /20:29595 /21:31383 /22:40922 /23:38994 /24:216136
/25:1228 /26:1487 /27:867 /28:13 /29:7 /30:6
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 2609 3197 Windstream Communications Inc
18566 2040 2090 Covad Communications
6389 1871 3394 bellsouth.net, inc.
8402 1418 1722 Corbina telecom
30036 1378 1441 Mediacom Communications Corp
11492 1136 1173 Cable One
22773 1087 1656 Cox Communications, Inc.
6503 1056 1524 AVANTEL, S.A.
1785 1041 1930 PaeTec Communications, Inc.
8452 1028 1268 TEDATA

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

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

1:568 2:776 3:1 4:13 5:92 6:3
8:431 12:2005 13:1 14:632 15:12 16:3
17:5 20:24 23:184 24:1777 27:1317 31:997
32:56 33:2 34:2 36:9 37:583 38:816
39:1 40:128 41:3137 42:142 44:3 46:1438
47:2 49:417 50:565 52:13 54:12 55:8
56:1 57:34 58:977 59:501 60:254 61:1223
62:969 63:2035 64:4252 65:2252 66:4473 67:2014
68:1152 69:3195 70:981 71:502 72:1831 74:2603
75:472 76:332 77:922 78:885 79:485 80:1196
81:947 82:663 83:525 84:493 85:1164 86:433
87:931 88:344 89:1667 90:300 91:4947 92:574
93:1223 94:1561 95:1225 96:395 97:318 98:907
99:39 100:18 101:252 103:1214 106:100 107:189
108:356 109:1410 110:782 111:939 112:422 113:629
114:649 115:829 116:928 117:732 118:920 119:1232
120:350 121:696 122:1670 123:1097 124:1396 125:1255
128:555 129:188 130:263 131:635 132:292 133:22
134:244 135:61 136:216 137:232 138:336 139:174
140:493 141:243 142:431 143:372 144:536 145:76
146:506 147:287 148:768 149:318 150:157 151:174
152:474 153:176 154:17 155:433 156:219 157:381
158:191 159:621 160:341 161:269 162:352 163:192
164:654 165:414 166:583 167:476 168:911 169:126
170:890 171:145 172:5 173:1744 174:627 175:436
176:555 177:876 178:1536 180:1271 181:98 182:1011
183:244 184:535 185:1 186:1910 187:1084 188:1347
189:1606 190:5753 192:6006 193:5488 194:4507 195:3429
196:1212 197:171 198:3670 199:4814 200:5886 201:1981
202:8691 203:8628 204:4334 205:2538 206:2768 207:2803
208:4030 209:3615 210:2778 211:1556 212:1925 213:1842
214:840 215:83 216:5111 217:1559 218:552 219:318
220:1238 221:570 222:321 223:352

End of report
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