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.

Tuesday, July 3, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 415246
Prefixes after maximum aggregation: 175418
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 202570
Total ASes present in the Internet Routing Table: 41401
Prefixes per ASN: 10.03
Origin-only ASes present in the Internet Routing Table: 33307
Origin ASes announcing only one prefix: 15659
Transit ASes present in the Internet Routing Table: 5551
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: 27
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 389
Unregistered ASNs in the Routing Table: 126
Number of 32-bit ASNs allocated by the RIRs: 2926
Number of 32-bit ASNs visible in the Routing Table: 2543
Prefixes from 32-bit ASNs in the Routing Table: 6600
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 156
Number of addresses announced to Internet: 2572567972
Equivalent to 153 /8s, 86 /16s and 69 /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: 144043

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

Prefixes being announced by APNIC Region ASes: 101298
Total APNIC prefixes after maximum aggregation: 32669
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 101752
Unique aggregates announced from the APNIC address blocks: 42052
APNIC Region origin ASes present in the Internet Routing Table: 4712
APNIC Prefixes per ASN: 21.59
APNIC Region origin ASes announcing only one prefix: 1238
APNIC Region transit ASes present in the Internet Routing Table: 750
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: 703658368
Equivalent to 41 /8s, 240 /16s and 249 /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: 152234
Total ARIN prefixes after maximum aggregation: 77319
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153171
Unique aggregates announced from the ARIN address blocks: 68358
ARIN Region origin ASes present in the Internet Routing Table: 15179
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: 1597
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: 1081231744
Equivalent to 64 /8s, 114 /16s and 73 /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: 103916
Total RIPE prefixes after maximum aggregation: 54968
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 106111
Unique aggregates announced from the RIPE address blocks: 67092
RIPE Region origin ASes present in the Internet Routing Table: 16640
RIPE Prefixes per ASN: 6.38
RIPE Region origin ASes announcing only one prefix: 8066
RIPE Region transit ASes present in the Internet Routing Table: 2691
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: 1674
Number of RIPE addresses announced to Internet: 635258372
Equivalent to 37 /8s, 221 /16s and 70 /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: 41639
Total LACNIC prefixes after maximum aggregation: 8246
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 44238
Unique aggregates announced from the LACNIC address blocks: 21654
LACNIC Region origin ASes present in the Internet Routing Table: 1607
LACNIC Prefixes per ASN: 27.53
LACNIC Region origin ASes announcing only one prefix: 435
LACNIC Region transit ASes present in the Internet Routing Table: 309
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 606
Number of LACNIC addresses announced to Internet: 111622048
Equivalent to 6 /8s, 167 /16s and 55 /24s
Percentage of available LACNIC address space announced: 66.5

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: 9364
Total AfriNIC prefixes after maximum aggregation: 2162
AfriNIC Deaggregation factor: 4.33
Prefixes being announced from the AfriNIC address blocks: 9818
Unique aggregates announced from the AfriNIC address blocks: 3279
AfriNIC Region origin ASes present in the Internet Routing Table: 553
AfriNIC Prefixes per ASN: 17.75
AfriNIC Region origin ASes announcing only one prefix: 174
AfriNIC Region transit ASes present in the Internet Routing Table: 124
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: 5
Number of AfriNIC addresses announced to Internet: 40501760
Equivalent to 2 /8s, 106 /16s and 2 /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 2704 11118 1207 Korea Telecom (KIX)
17974 2045 526 80 PT TELEKOMUNIKASI INDONESIA
7545 1690 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
7552 1124 1062 11 Vietel Corporation
4808 1096 2052 314 CNCGROUP IP network: China169
24560 1035 385 165 Bharti Airtel Ltd., Telemedia
9498 973 291 64 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 3391 3789 188 bellsouth.net, inc.
7029 3244 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 1404 267 775 Mediacom Communications Corp
7018 1258 10029 822 AT&T WorldNet Services
11492 1191 216 354 Cable One

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 1706 544 16 Corbina telecom
2118 1288 97 14 EUnet/RELCOM Autonomous Syste
12479 782 731 91 Uni2 Autonomous System
34984 719 189 175 BILISIM TELEKOM
31148 693 37 9 FreeNet ISP
6830 689 2234 437 UPC Distribution Services
20940 656 209 508 Akamai Technologies European
8551 579 364 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 1926 1213 54 NET Servicos de Comunicao S.A
6503 1526 418 66 AVANTEL, S.A.
7303 1455 933 193 Telecom Argentina Stet-France
8151 1377 3065 343 UniNet S.A. de C.V.
27947 689 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 1267 958 13 TEDATA
24863 864 274 35 LINKdotNET AS number
6713 504 649 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 3391 3789 188 bellsouth.net, inc.
7029 3244 986 157 Windstream Communications Inc
4766 2704 11118 1207 Korea Telecom (KIX)
18566 2090 382 180 Covad Communications
17974 2045 526 80 PT TELEKOMUNIKASI INDONESIA
10620 1983 345 204 TVCABLE BOGOTA
1785 1930 681 132 PaeTec Communications, Inc.
28573 1926 1213 54 NET Servicos de Comunicao S.A
8402 1706 544 16 Corbina telecom
7545 1690 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 3244 3087 Windstream Communications Inc
17974 2045 1965 PT TELEKOMUNIKASI INDONESIA
18566 2090 1910 Covad Communications
28573 1926 1872 NET Servicos de Comunicao S.A
1785 1930 1798 PaeTec Communications, Inc.
10620 1983 1779 TVCABLE BOGOTA
8402 1706 1690 Corbina telecom
7545 1690 1603 TPG Internet Pty Ltd
22773 1656 1535 Cox Communications, Inc.
4766 2704 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
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 /14:840 /15:1517 /16:12301 /17:6366 /18:10770
/19:20913 /20:29649 /21:31398 /22:40978 /23:38968 /24:217098
/25:1227 /26:1476 /27:857 /28:13 /29:7 /30:6
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 2624 3244 Windstream Communications Inc
18566 2040 2090 Covad Communications
6389 1871 3391 bellsouth.net, inc.
8402 1401 1706 Corbina telecom
30036 1341 1404 Mediacom Communications Corp
11492 1154 1191 Cable One
22773 1087 1656 Cox Communications, Inc.
6503 1058 1526 AVANTEL, S.A.
1785 1041 1930 PaeTec Communications, Inc.
8452 1026 1267 TEDATA

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

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

1:569 2:764 3:1 4:13 5:129 6:3
8:431 12:2009 13:1 14:632 15:12 16:3
17:5 20:24 23:179 24:1791 27:1317 31:998
32:56 33:2 34:2 36:9 37:593 38:816
39:1 40:128 41:3160 42:142 44:3 46:1467
47:2 49:415 50:555 52:13 54:12 55:7
56:1 57:34 58:978 59:500 60:253 61:1230
62:1002 63:2036 64:4258 65:2241 66:4489 67:2019
68:1153 69:3199 70:981 71:508 72:1836 74:2603
75:473 76:331 77:952 78:898 79:487 80:1213
81:947 82:671 83:525 84:495 85:1194 86:432
87:932 88:341 89:1743 90:300 91:4977 92:576
93:1362 94:1561 95:1239 96:379 97:318 98:910
99:39 100:18 101:251 103:1221 106:101 107:188
108:358 109:1413 110:783 111:937 112:421 113:598
114:648 115:829 116:932 117:731 118:934 119:1231
120:350 121:691 122:1670 123:1100 124:1396 125:1254
128:555 129:188 130:263 131:636 132:291 133:22
134:243 135:61 136:216 137:240 138:336 139:172
140:493 141:261 142:433 143:371 144:535 145:76
146:513 147:287 148:767 149:318 150:157 151:182
152:474 153:176 154:17 155:434 156:219 157:381
158:191 159:623 160:341 161:268 162:371 163:187
164:656 165:414 166:586 167:479 168:912 169:126
170:888 171:145 172:5 173:1726 174:629 175:438
176:554 177:895 178:1533 180:1214 181:98 182:1023
183:244 184:529 185:1 186:1921 187:1081 188:1357
189:1610 190:5754 192:6005 193:5538 194:4548 195:3436
196:1211 197:169 198:3667 199:4835 200:5928 201:1981
202:8678 203:8633 204:4333 205:2534 206:2801 207:2801
208:4042 209:3619 210:2779 211:1557 212:2025 213:1934
214:861 215:82 216:5115 217:1566 218:553 219:316
220:1238 221:571 222:338 223:353

End of report
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