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, June 26, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 27 Jun, 2012

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

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

BGP routing table entries examined: 415141
Prefixes after maximum aggregation: 175338
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 202282
Total ASes present in the Internet Routing Table: 41366
Prefixes per ASN: 10.04
Origin-only ASes present in the Internet Routing Table: 33296
Origin ASes announcing only one prefix: 15660
Transit ASes present in the Internet Routing Table: 5548
Transit-only ASes present in the Internet Routing Table: 139
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 28
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 389
Unregistered ASNs in the Routing Table: 122
Number of 32-bit ASNs allocated by the RIRs: 2890
Number of 32-bit ASNs visible in the Routing Table: 2522
Prefixes from 32-bit ASNs in the Routing Table: 6484
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 263
Number of addresses announced to Internet: 2569673964
Equivalent to 153 /8s, 42 /16s and 28 /24s
Percentage of available address space announced: 69.3
Percentage of allocated address space announced: 69.4
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: 144543

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

Prefixes being announced by APNIC Region ASes: 100997
Total APNIC prefixes after maximum aggregation: 32693
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 101434
Unique aggregates announced from the APNIC address blocks: 41800
APNIC Region origin ASes present in the Internet Routing Table: 4707
APNIC Prefixes per ASN: 21.55
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 748
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: 240
Number of APNIC addresses announced to Internet: 703523392
Equivalent to 41 /8s, 238 /16s and 234 /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: 152079
Total ARIN prefixes after maximum aggregation: 77279
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153034
Unique aggregates announced from the ARIN address blocks: 68190
ARIN Region origin ASes present in the Internet Routing Table: 15177
ARIN Prefixes per ASN: 10.08
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: 4.0
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: 1081164416
Equivalent to 64 /8s, 113 /16s and 66 /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: 103650
Total RIPE prefixes after maximum aggregation: 54819
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 105709
Unique aggregates announced from the RIPE address blocks: 66818
RIPE Region origin ASes present in the Internet Routing Table: 16634
RIPE Prefixes per ASN: 6.35
RIPE Region origin ASes announcing only one prefix: 8065
RIPE Region transit ASes present in the Internet Routing Table: 2673
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1666
Number of RIPE addresses announced to Internet: 632822660
Equivalent to 37 /8s, 184 /16s and 27 /24s
Percentage of available RIPE address space announced: 92.0

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: 42447
Total LACNIC prefixes after maximum aggregation: 8313
LACNIC Deaggregation factor: 5.11
Prefixes being announced from the LACNIC address blocks: 44967
Unique aggregates announced from the LACNIC address blocks: 21926
LACNIC Region origin ASes present in the Internet Routing Table: 1604
LACNIC Prefixes per ASN: 28.03
LACNIC Region origin ASes announcing only one prefix: 432
LACNIC Region transit ASes present in the Internet Routing Table: 309
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 594
Number of LACNIC addresses announced to Internet: 111171240
Equivalent to 6 /8s, 160 /16s and 86 /24s
Percentage of available LACNIC address space announced: 66.3

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: 9288
Total AfriNIC prefixes after maximum aggregation: 2176
AfriNIC Deaggregation factor: 4.27
Prefixes being announced from the AfriNIC address blocks: 9734
Unique aggregates announced from the AfriNIC address blocks: 3313
AfriNIC Region origin ASes present in the Internet Routing Table: 549
AfriNIC Prefixes per ASN: 17.73
AfriNIC Region origin ASes announcing only one prefix: 170
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: 5
Number of AfriNIC addresses announced to Internet: 40505600
Equivalent to 2 /8s, 106 /16s and 17 /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 2694 11117 1196 Korea Telecom (KIX)
17974 1945 533 80 PT TELEKOMUNIKASI INDONESIA
7545 1686 301 84 TPG Internet Pty Ltd
4755 1592 385 153 TATA Communications formerly
9829 1300 1085 28 BSNL National Internet Backbo
9583 1160 87 518 Sify Limited
4808 1108 2054 314 CNCGROUP IP network: China169
7552 1104 1062 11 Vietel Corporation
24560 1035 385 165 Bharti Airtel Ltd., Telemedia
9498 967 291 63 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 3399 3790 192 bellsouth.net, inc.
7029 3210 986 157 Windstream Communications Inc
18566 2090 382 180 Covad Communications
1785 1927 681 132 PaeTec Communications, Inc.
22773 1654 2911 121 Cox Communications, Inc.
20115 1648 1571 614 Charter Communications
4323 1573 1043 384 Time Warner Telecom
30036 1441 269 763 Mediacom Communications Corp
7018 1224 10013 822 AT&T WorldNet Services
7011 1189 318 683 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 1723 544 16 Corbina telecom
2118 1288 97 14 EUnet/RELCOM Autonomous Syste
12479 757 722 94 Uni2 Autonomous System
34984 716 189 175 BILISIM TELEKOM
31148 690 37 9 FreeNet ISP
6830 688 2234 437 UPC Distribution Services
20940 658 210 514 Akamai Technologies European
8551 578 364 61 Bezeq International
13188 512 100 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 1978 344 207 TVCABLE BOGOTA
28573 1964 1212 55 NET Servicos de Comunicao S.A
6503 1531 418 65 AVANTEL, S.A.
8151 1488 3075 333 UniNet S.A. de C.V.
7303 1440 901 195 Telecom Argentina Stet-France
26615 896 732 33 Tim Brasil S.A.
27947 705 73 93 Telconet S.A
11172 645 91 74 Servicios Alestra S.A de C.V
3816 588 248 88 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 1278 958 13 TEDATA
24863 789 274 35 LINKdotNET AS number
6713 499 649 18 Itissalat Al-MAGHRIB
24835 321 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
33776 209 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
16637 172 664 87 MTN Network Solutions
29975 167 571 19 Vodacom
15706 164 32 6 Sudatel Internet Exchange Aut

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 3399 3790 192 bellsouth.net, inc.
7029 3210 986 157 Windstream Communications Inc
4766 2694 11117 1196 Korea Telecom (KIX)
18566 2090 382 180 Covad Communications
10620 1978 344 207 TVCABLE BOGOTA
28573 1964 1212 55 NET Servicos de Comunicao S.A
17974 1945 533 80 PT TELEKOMUNIKASI INDONESIA
1785 1927 681 132 PaeTec Communications, Inc.
8402 1723 544 16 Corbina telecom
7545 1686 301 84 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 3210 3053 Windstream Communications Inc
18566 2090 1910 Covad Communications
28573 1964 1909 NET Servicos de Comunicao S.A
17974 1945 1865 PT TELEKOMUNIKASI INDONESIA
1785 1927 1795 PaeTec Communications, Inc.
10620 1978 1771 TVCABLE BOGOTA
8402 1723 1707 Corbina telecom
7545 1686 1602 TPG Internet Pty Ltd
22773 1654 1533 Cox Communications, Inc.
4766 2694 1498 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
5.100.0.0/18 28876 suec // dacor GmbH - ISP Cobu
5.100.64.0/24 42038 VladLink LTD AS
5.100.64.0/18 42038 VladLink LTD AS
5.101.0.0/16 44050 RIPE Network Coordination Cen
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

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
/13:462 /14:835 /15:1513 /16:12286 /17:6334 /18:10737
/19:20813 /20:29565 /21:31285 /22:40883 /23:38786 /24:217427
/25:1232 /26:1465 /27:862 /28:171 /29:64 /30:19
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2619 3210 Windstream Communications Inc
18566 2040 2090 Covad Communications
6389 1873 3399 bellsouth.net, inc.
8402 1418 1723 Corbina telecom
30036 1380 1441 Mediacom Communications Corp
11492 1152 1189 Cable One
22773 1086 1654 Cox Communications, Inc.
6503 1062 1531 AVANTEL, S.A.
8452 1042 1278 TEDATA
1785 1038 1927 PaeTec Communications, Inc.

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

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

1:564 2:749 3:1 4:13 5:65 6:3
8:431 12:2015 13:1 14:637 15:12 16:3
17:5 20:24 23:187 24:1785 27:1299 31:988
32:56 33:2 34:2 36:9 37:589 38:814
39:1 40:127 41:3155 42:140 44:3 46:1460
47:2 49:415 50:564 52:13 54:12 55:9
56:1 57:34 58:963 59:500 60:259 61:1224
62:998 63:2039 64:4252 65:2252 66:4462 67:2022
68:1153 69:3190 70:983 71:503 72:1830 74:2603
75:475 76:330 77:954 78:966 79:493 80:1220
81:949 82:653 83:525 84:493 85:1193 86:419
87:931 88:331 89:1722 90:298 91:4974 92:573
93:1397 94:1588 95:1233 96:373 97:317 98:896
99:39 100:17 101:252 103:1204 106:103 107:189
108:346 109:1408 110:784 111:927 112:419 113:630
114:648 115:823 116:950 117:731 118:829 119:1233
120:349 121:693 122:1671 123:1099 124:1394 125:1260
128:555 129:198 130:253 131:634 132:292 133:22
134:244 135:61 136:215 137:240 138:334 139:185
140:493 141:253 142:436 143:377 144:536 145:76
146:510 147:290 148:778 149:315 150:164 151:175
152:473 153:175 154:17 155:437 156:225 157:382
158:190 159:620 160:340 161:269 162:352 163:192
164:643 165:413 166:582 167:475 168:912 169:127
170:888 171:139 172:5 173:1773 174:635 175:436
176:553 177:860 178:1529 180:1262 181:98 182:1021
183:241 184:521 185:1 186:2390 187:1137 188:1349
189:1859 190:5645 192:6012 193:5536 194:4543 195:3418
196:1225 197:162 198:3673 199:4798 200:5923 201:1971
202:8664 203:8619 204:4339 205:2537 206:2809 207:2792
208:4040 209:3606 210:2774 211:1554 212:2025 213:1925
214:871 215:82 216:5097 217:1563 218:550 219:311
220:1241 221:570 222:316 223:355

End of report
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