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.

Wednesday, July 18, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 19 Jul, 2012

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

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

BGP routing table entries examined: 417611
Prefixes after maximum aggregation: 176129
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 203556
Total ASes present in the Internet Routing Table: 41548
Prefixes per ASN: 10.05
Origin-only ASes present in the Internet Routing Table: 33334
Origin ASes announcing only one prefix: 15696
Transit ASes present in the Internet Routing Table: 5588
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: 34
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 364
Unregistered ASNs in the Routing Table: 133
Number of 32-bit ASNs allocated by the RIRs: 3000
Number of 32-bit ASNs visible in the Routing Table: 2626
Prefixes from 32-bit ASNs in the Routing Table: 6782
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 168
Number of addresses announced to Internet: 2566715052
Equivalent to 152 /8s, 252 /16s and 246 /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: 145042

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

Prefixes being announced by APNIC Region ASes: 102068
Total APNIC prefixes after maximum aggregation: 32814
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 102537
Unique aggregates announced from the APNIC address blocks: 42128
APNIC Region origin ASes present in the Internet Routing Table: 4716
APNIC Prefixes per ASN: 21.74
APNIC Region origin ASes announcing only one prefix: 1247
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: 249
Number of APNIC addresses announced to Internet: 704424320
Equivalent to 41 /8s, 252 /16s and 169 /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: 152834
Total ARIN prefixes after maximum aggregation: 77496
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153857
Unique aggregates announced from the ARIN address blocks: 68684
ARIN Region origin ASes present in the Internet Routing Table: 15194
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5765
ARIN Region transit ASes present in the Internet Routing Table: 1609
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: 1071513088
Equivalent to 63 /8s, 221 /16s and 254 /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: 103846
Total RIPE prefixes after maximum aggregation: 55225
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 106000
Unique aggregates announced from the RIPE address blocks: 67306
RIPE Region origin ASes present in the Internet Routing Table: 16679
RIPE Prefixes per ASN: 6.36
RIPE Region origin ASes announcing only one prefix: 8084
RIPE Region transit ASes present in the Internet Routing Table: 2713
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 34
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1728
Number of RIPE addresses announced to Internet: 636818564
Equivalent to 37 /8s, 245 /16s and 20 /24s
Percentage of available RIPE address space announced: 92.6

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: 42507
Total LACNIC prefixes after maximum aggregation: 8370
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 45198
Unique aggregates announced from the LACNIC address blocks: 21886
LACNIC Region origin ASes present in the Internet Routing Table: 1610
LACNIC Prefixes per ASN: 28.07
LACNIC Region origin ASes announcing only one prefix: 425
LACNIC Region transit ASes present in the Internet Routing Table: 312
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: 626
Number of LACNIC addresses announced to Internet: 112425640
Equivalent to 6 /8s, 179 /16s and 122 /24s
Percentage of available LACNIC address space announced: 67.0

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: 9416
Total AfriNIC prefixes after maximum aggregation: 2170
AfriNIC Deaggregation factor: 4.34
Prefixes being announced from the AfriNIC address blocks: 9851
Unique aggregates announced from the AfriNIC address blocks: 3410
AfriNIC Region origin ASes present in the Internet Routing Table: 555
AfriNIC Prefixes per ASN: 17.75
AfriNIC Region origin ASes announcing only one prefix: 175
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 41009664
Equivalent to 2 /8s, 113 /16s and 194 /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 2737 11122 1240 Korea Telecom (KIX)
17974 2228 562 84 PT TELEKOMUNIKASI INDONESIA
7545 1676 301 86 TPG Internet Pty Ltd
4755 1614 388 162 TATA Communications formerly
9829 1303 1085 28 BSNL National Internet Backbo
9583 1162 88 508 Sify Limited
7552 1127 1062 11 Vietel Corporation
4808 1117 2053 318 CNCGROUP IP network: China169
24560 1037 385 165 Bharti Airtel Ltd., Telemedia
9498 983 291 68 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 3415 998 172 Windstream Communications Inc
6389 3386 3773 186 bellsouth.net, inc.
18566 2088 382 181 Covad Communications
1785 1937 681 131 PaeTec Communications, Inc.
22773 1677 2911 122 Cox Communications, Inc.
20115 1649 1571 615 Charter Communications
4323 1574 1044 383 Time Warner Telecom
30036 1389 270 778 Mediacom Communications Corp
7018 1257 10040 824 AT&T WorldNet Services
7011 1191 316 697 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 1697 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 712 2302 446 UPC Distribution Services
31148 705 37 9 FreeNet ISP
20940 674 218 528 Akamai Technologies European
13188 617 100 10 Educational Network
8551 578 364 61 Bezeq International
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
10620 2001 347 208 TVCABLE BOGOTA
28573 1960 1220 58 NET Servicos de Comunicao S.A
6503 1523 418 66 AVANTEL, S.A.
8151 1466 3044 344 UniNet S.A. de C.V.
7303 1454 934 194 Telecom Argentina Stet-France
6458 852 81 15 GUATEL
27947 716 73 93 Telconet S.A
11172 643 91 74 Servicios Alestra S.A de C.V
3816 596 250 83 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 961 958 13 TEDATA
24863 863 274 32 LINKdotNET AS number
6713 509 650 19 Itissalat Al-MAGHRIB
36998 433 48 3 MOBITEL
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
29571 160 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 3415 998 172 Windstream Communications Inc
6389 3386 3773 186 bellsouth.net, inc.
4766 2737 11122 1240 Korea Telecom (KIX)
17974 2228 562 84 PT TELEKOMUNIKASI INDONESIA
18566 2088 382 181 Covad Communications
10620 2001 347 208 TVCABLE BOGOTA
28573 1960 1220 58 NET Servicos de Comunicao S.A
1785 1937 681 131 PaeTec Communications, Inc.
8402 1697 544 16 Corbina telecom
22773 1677 2911 122 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 3386 3200 bellsouth.net, inc.
17974 2228 2144 PT TELEKOMUNIKASI INDONESIA
18566 2088 1907 Covad Communications
28573 1960 1902 NET Servicos de Comunicao S.A
1785 1937 1806 PaeTec Communications, Inc.
10620 2001 1793 TVCABLE BOGOTA
8402 1697 1681 Corbina telecom
7545 1676 1590 TPG Internet Pty Ltd
22773 1677 1555 Cox Communications, Inc.
4766 2737 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
59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o.
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

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
5.149.192.0/21 23456 32-bit ASN transition
5.149.200.0/21 50477 Kostroma regional networks AS
5.149.224.0/20 20902 DegNet GmbH
5.150.128.0/20 5602 KPNQwest Italia S.p.a
5.150.192.0/18 8473 Bahnhof Autonomous System
5.151.0.0/16 42689 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

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 /14:844 /15:1518 /16:12292 /17:6363 /18:10758
/19:20903 /20:29768 /21:31608 /22:41180 /23:39350 /24:218373
/25:1220 /26:1468 /27:852 /28:166 /29:59 /30:18
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2762 3415 Windstream Communications Inc
18566 2038 2088 Covad Communications
6389 1866 3386 bellsouth.net, inc.
8402 1391 1697 Corbina telecom
30036 1324 1389 Mediacom Communications Corp
11492 1154 1191 Cable One
22773 1104 1677 Cox Communications, Inc.
6503 1051 1523 AVANTEL, S.A.
1785 1044 1937 PaeTec Communications, Inc.
7011 930 1191 Citizens Utilities

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

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

1:576 2:773 3:1 4:13 5:141 6:3
8:436 12:2012 13:1 14:637 15:11 16:3
17:5 20:24 23:192 24:1796 27:1324 31:1002
32:56 33:2 34:2 36:8 37:644 38:825
39:1 40:128 41:2850 42:140 44:3 46:1526
47:2 49:431 50:555 52:13 54:14 55:8
56:1 57:31 58:976 59:529 60:245 61:1341
62:919 63:2034 64:4247 65:2245 66:4495 67:2012
68:1158 69:3203 70:986 71:514 72:1872 74:2612
75:488 76:335 77:937 78:926 79:492 80:1226
81:942 82:629 83:535 84:506 85:1141 86:422
87:924 88:346 89:1664 90:302 91:5019 92:580
93:1300 94:1560 95:1248 96:397 97:323 98:885
99:39 100:22 101:258 103:1286 105:414 106:115
107:189 108:379 109:1466 110:788 111:940 112:429
113:649 114:657 115:907 116:922 117:730 118:894
119:1231 120:354 121:800 122:1664 123:1168 124:1379
125:1259 128:556 129:186 130:266 131:634 132:300
133:22 134:246 135:61 136:215 137:241 138:334
139:178 140:496 141:252 142:432 143:375 144:478
145:77 146:514 147:287 148:769 149:319 150:153
151:185 152:475 153:176 154:17 155:433 156:222
157:382 158:190 159:628 160:341 161:274 162:378
163:192 164:673 165:413 166:588 167:533 168:913
169:125 170:898 171:147 172:5 173:1735 174:611
175:436 176:566 177:951 178:1615 180:1312 181:108
182:997 183:232 184:551 186:2003 187:1079 188:1371
189:1570 190:6125 192:6010 193:5540 194:4481 195:3224
196:1205 197:174 198:3684 199:4925 200:5961 201:1965
202:8708 203:8667 204:4388 205:2544 206:2804 207:2827
208:4041 209:3631 210:2785 211:1565 212:1963 213:1821
214:878 215:85 216:5077 217:1559 218:557 219:337
220:1230 221:569 222:336 223:347

End of report
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