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.

Saturday, April 28, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 29 Apr, 2012

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

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

BGP routing table entries examined: 406963
Prefixes after maximum aggregation: 172925
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 198020
Total ASes present in the Internet Routing Table: 40817
Prefixes per ASN: 9.97
Origin-only ASes present in the Internet Routing Table: 33095
Origin ASes announcing only one prefix: 15599
Transit ASes present in the Internet Routing Table: 5454
Transit-only ASes present in the Internet Routing Table: 136
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 64
Max AS path prepend of ASN ( 9902) 56
Prefixes from unregistered ASNs in the Routing Table: 397
Unregistered ASNs in the Routing Table: 129
Number of 32-bit ASNs allocated by the RIRs: 2643
Number of 32-bit ASNs visible in the Routing Table: 2268
Prefixes from 32-bit ASNs in the Routing Table: 5657
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 109
Number of addresses announced to Internet: 2540090320
Equivalent to 151 /8s, 102 /16s and 179 /24s
Percentage of available address space announced: 68.5
Percentage of allocated address space announced: 68.6
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.5
Total number of prefixes smaller than registry allocations: 173618

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

Prefixes being announced by APNIC Region ASes: 99434
Total APNIC prefixes after maximum aggregation: 32259
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 95921
Unique aggregates announced from the APNIC address blocks: 39835
APNIC Region origin ASes present in the Internet Routing Table: 4686
APNIC Prefixes per ASN: 20.47
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 732
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 20
Number of APNIC region 32-bit ASNs visible in the Routing Table: 190
Number of APNIC addresses announced to Internet: 644272480
Equivalent to 38 /8s, 102 /16s and 209 /24s
Percentage of available APNIC address space announced: 81.7

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 132096-133119
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, 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: 150151
Total ARIN prefixes after maximum aggregation: 76312
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121275
Unique aggregates announced from the ARIN address blocks: 50429
ARIN Region origin ASes present in the Internet Routing Table: 15040
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5714
ARIN Region transit ASes present in the Internet Routing Table: 1583
Average ARIN Region AS path length visible: 4.0
Max ARIN Region AS path length visible: 30
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 807273920
Equivalent to 48 /8s, 30 /16s and 5 /24s
Percentage of available ARIN address space announced: 64.4

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, 173/8,
174/8, 184/8, 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: 101771
Total RIPE prefixes after maximum aggregation: 53887
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 93641
Unique aggregates announced from the RIPE address blocks: 58418
RIPE Region origin ASes present in the Internet Routing Table: 16525
RIPE Prefixes per ASN: 5.67
RIPE Region origin ASes announcing only one prefix: 8041
RIPE Region transit ASes present in the Internet Routing Table: 2630
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: 1525
Number of RIPE addresses announced to Internet: 510978184
Equivalent to 30 /8s, 116 /16s and 232 /24s
Percentage of available RIPE address space announced: 82.3

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
196608-198655
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,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 40859
Total LACNIC prefixes after maximum aggregation: 8264
LACNIC Deaggregation factor: 4.94
Prefixes being announced from the LACNIC address blocks: 40732
Unique aggregates announced from the LACNIC address blocks: 20218
LACNIC Region origin ASes present in the Internet Routing Table: 1590
LACNIC Prefixes per ASN: 25.62
LACNIC Region origin ASes announcing only one prefix: 436
LACNIC Region transit ASes present in the Internet Routing Table: 297
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: 531
Number of LACNIC addresses announced to Internet: 99642760
Equivalent to 5 /8s, 240 /16s and 109 /24s
Percentage of available LACNIC address space announced: 66.0

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,
200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 8913
Total AfriNIC prefixes after maximum aggregation: 2134
AfriNIC Deaggregation factor: 4.18
Prefixes being announced from the AfriNIC address blocks: 6982
Unique aggregates announced from the AfriNIC address blocks: 2222
AfriNIC Region origin ASes present in the Internet Routing Table: 533
AfriNIC Prefixes per ASN: 13.10
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 120
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: 31785216
Equivalent to 1 /8s, 229 /16s and 1 /24s
Percentage of available AfriNIC address space announced: 47.4

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 2485 11112 1010 Korea Telecom (KIX)
17974 1822 509 71 PT TELEKOMUNIKASI INDONESIA
7545 1679 301 88 TPG Internet Pty Ltd
4755 1577 385 156 TATA Communications formerly
9829 1259 1069 30 BSNL National Internet Backbo
7552 1169 1062 11 Vietel Corporation
9583 1145 84 490 Sify Limited
4808 1110 2050 318 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 955 291 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 3425 3807 194 bellsouth.net, inc.
7029 3368 986 158 Windstream Communications Inc
18566 2091 382 179 Covad Communications
1785 1906 680 131 PaeTec Communications, Inc.
20115 1639 1566 619 Charter Communications
4323 1599 1044 383 Time Warner Telecom
22773 1581 2910 114 Cox Communications, Inc.
30036 1421 261 769 Mediacom Communications Corp
7018 1247 9774 818 AT&T WorldNet Services
11492 1186 216 364 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 1598 544 16 Corbina telecom
2118 1304 97 14 EUnet/RELCOM Autonomous Syste
31148 682 37 9 FreeNet ISP
34984 681 188 173 BILISIM TELEKOM
6830 655 2215 426 UPC Distribution Services
12479 650 668 66 Uni2 Autonomous System
20940 636 206 498 Akamai Technologies European
8551 571 360 80 Bezeq International
3320 531 8441 397 Deutsche Telekom AG
2578 501 33 7 Demos, Moscow, Russia

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 1851 332 177 TVCABLE BOGOTA
28573 1797 1114 62 NET Servicos de Comunicao S.A
6503 1533 418 65 AVANTEL, S.A.
8151 1484 3000 344 UniNet S.A. de C.V.
7303 1362 829 187 Telecom Argentina Stet-France
26615 904 761 33 Tim Brasil S.A.
27947 685 74 98 Telconet S.A
11172 638 91 72 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 572 242 100 Empresa Nacional de Telecomun

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 1310 958 13 TEDATA
24863 840 274 35 LINKdotNET AS number
6713 493 649 18 Itissalat Al-MAGHRIB
3741 265 921 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
33776 195 12 24 Starcomms Nigeria Limited
24835 179 80 8 RAYA Telecom - Egypt
16637 174 666 83 MTN Network Solutions
15706 169 32 6 Sudatel Internet Exchange Aut
29571 157 15 16 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
6389 3425 3807 194 bellsouth.net, inc.
7029 3368 986 158 Windstream Communications Inc
4766 2485 11112 1010 Korea Telecom (KIX)
18566 2091 382 179 Covad Communications
1785 1906 680 131 PaeTec Communications, Inc.
10620 1851 332 177 TVCABLE BOGOTA
17974 1822 509 71 PT TELEKOMUNIKASI INDONESIA
28573 1797 1114 62 NET Servicos de Comunicao S.A
7545 1679 301 88 TPG Internet Pty Ltd
20115 1639 1566 619 Charter Communications

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 3368 3210 Windstream Communications Inc
18566 2091 1912 Covad Communications
1785 1906 1775 PaeTec Communications, Inc.
17974 1822 1751 PT TELEKOMUNIKASI INDONESIA
28573 1797 1735 NET Servicos de Comunicao S.A
10620 1851 1674 TVCABLE BOGOTA
7545 1679 1591 TPG Internet Pty Ltd
8402 1598 1582 Corbina telecom
4766 2485 1475 Korea Telecom (KIX)
6503 1533 1468 AVANTEL, S.A.

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
32567 UNALLOCATED 12.14.170.0/24 4323 Time Warner Telecom
32567 UNALLOCATED 12.25.107.0/24 4323 Time Warner Telecom
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
32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser

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
5.2.0.0/21 23456 32-bit ASN transition
5.3.0.0/16 41733 JSC "Z-Telecom"
5.16.0.0/14 41733 JSC "Z-Telecom"
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

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 /11:81 /12:235
/13:460 /14:832 /15:1489 /16:12239 /17:6253 /18:10534
/19:20612 /20:29028 /21:30092 /22:40561 /23:38030 /24:212784
/25:1195 /26:1429 /27:783 /28:165 /29:66 /30:17
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 3026 3368 Windstream Communications Inc
6389 2143 3425 bellsouth.net, inc.
18566 2040 2091 Covad Communications
10620 1712 1851 TVCABLE BOGOTA
8402 1576 1598 Corbina telecom
30036 1365 1421 Mediacom Communications Corp
6503 1291 1533 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1110 1310 TEDATA
1785 1072 1906 PaeTec Communications, Inc.

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

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

1:539 2:532 4:10 6:3 8:405 12:2010
13:1 14:609 15:12 16:3 17:5 20:23
23:167 24:1762 27:1273 31:951 32:57 33:2
34:2 36:8 37:424 38:798 40:120 41:3116
42:134 44:3 46:1482 47:3 49:398 50:539
52:13 54:8 55:9 56:3 57:31 58:972
59:494 60:254 61:1206 62:974 63:1988 64:4175
65:2255 66:4480 67:2022 68:1166 69:3191 70:903
71:484 72:1836 74:2602 75:494 76:318 77:947
78:999 79:488 80:1208 81:905 82:673 83:550
84:483 85:1209 86:411 87:929 88:340 89:1587
90:291 91:4768 92:522 93:1502 94:1500 95:890
96:358 97:315 98:899 99:37 100:7 101:181
103:1021 106:102 107:191 108:269 109:1313 110:757
111:923 112:454 113:601 114:641 115:816 116:928
117:722 118:907 119:1230 120:354 121:691 122:1676
123:1103 124:1381 125:1245 128:559 129:195 130:256
131:618 132:180 133:22 134:231 135:62 136:214
137:176 138:355 139:163 140:492 141:243 142:407
143:392 144:521 145:74 146:499 147:278 148:768
149:306 150:159 151:179 152:464 153:172 154:12
155:396 156:214 157:376 158:176 159:541 160:338
161:260 162:348 163:191 164:580 165:399 166:573
167:468 168:820 169:128 170:859 171:127 172:2
173:1757 174:572 175:438 176:683 177:649 178:1360
180:1195 181:79 182:827 183:289 184:458 185:1
186:2233 187:1057 188:1240 189:1791 190:5509 192:5999
193:5550 194:4657 195:3600 196:1274 197:129 198:3645
199:4539 200:5750 201:1920 202:8504 203:8618 204:4328
205:2480 206:2745 207:2797 208:4054 209:3621 210:2738
211:1474 212:1996 213:1927 214:845 215:104 216:5124
217:1534 218:543 219:318 220:1230 221:558 222:323
223:336

End of report
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