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, May 14, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 15 May, 2012

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

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

BGP routing table entries examined: 407543
Prefixes after maximum aggregation: 173648
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 199097
Total ASes present in the Internet Routing Table: 40974
Prefixes per ASN: 9.95
Origin-only ASes present in the Internet Routing Table: 33182
Origin ASes announcing only one prefix: 15645
Transit ASes present in the Internet Routing Table: 5469
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: 366
Unregistered ASNs in the Routing Table: 133
Number of 32-bit ASNs allocated by the RIRs: 2692
Number of 32-bit ASNs visible in the Routing Table: 2323
Prefixes from 32-bit ASNs in the Routing Table: 5875
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 105
Number of addresses announced to Internet: 2548300080
Equivalent to 151 /8s, 227 /16s and 249 /24s
Percentage of available address space announced: 68.8
Percentage of allocated address space announced: 68.8
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.6
Total number of prefixes smaller than registry allocations: 174162

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

Prefixes being announced by APNIC Region ASes: 100009
Total APNIC prefixes after maximum aggregation: 32406
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 96466
Unique aggregates announced from the APNIC address blocks: 39863
APNIC Region origin ASes present in the Internet Routing Table: 4691
APNIC Prefixes per ASN: 20.56
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 725
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: 203
Number of APNIC addresses announced to Internet: 644585856
Equivalent to 38 /8s, 107 /16s and 153 /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: 150787
Total ARIN prefixes after maximum aggregation: 76578
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121651
Unique aggregates announced from the ARIN address blocks: 50789
ARIN Region origin ASes present in the Internet Routing Table: 15102
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5742
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: 16
Number of ARIN addresses announced to Internet: 812026560
Equivalent to 48 /8s, 102 /16s and 138 /24s
Percentage of available ARIN address space announced: 64.7

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, 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: 100303
Total RIPE prefixes after maximum aggregation: 54153
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92473
Unique aggregates announced from the RIPE address blocks: 58735
RIPE Region origin ASes present in the Internet Routing Table: 16550
RIPE Prefixes per ASN: 5.59
RIPE Region origin ASes announcing only one prefix: 8051
RIPE Region transit ASes present in the Internet Routing Table: 2639
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1550
Number of RIPE addresses announced to Internet: 513184712
Equivalent to 30 /8s, 150 /16s and 147 /24s
Percentage of available RIPE address space announced: 82.7

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: 41338
Total LACNIC prefixes after maximum aggregation: 8283
LACNIC Deaggregation factor: 4.99
Prefixes being announced from the LACNIC address blocks: 41324
Unique aggregates announced from the LACNIC address blocks: 20436
LACNIC Region origin ASes present in the Internet Routing Table: 1595
LACNIC Prefixes per ASN: 25.91
LACNIC Region origin ASes announcing only one prefix: 439
LACNIC Region transit ASes present in the Internet Routing Table: 299
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: 549
Number of LACNIC addresses announced to Internet: 100244872
Equivalent to 5 /8s, 249 /16s and 157 /24s
Percentage of available LACNIC address space announced: 66.4

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: 9053
Total AfriNIC prefixes after maximum aggregation: 2162
AfriNIC Deaggregation factor: 4.19
Prefixes being announced from the AfriNIC address blocks: 7093
Unique aggregates announced from the AfriNIC address blocks: 2214
AfriNIC Region origin ASes present in the Internet Routing Table: 540
AfriNIC Prefixes per ASN: 13.14
AfriNIC Region origin ASes announcing only one prefix: 172
AfriNIC Region transit ASes present in the Internet Routing Table: 121
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: 31833344
Equivalent to 1 /8s, 229 /16s and 189 /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 2569 11115 1063 Korea Telecom (KIX)
17974 1868 510 73 PT TELEKOMUNIKASI INDONESIA
7545 1680 301 87 TPG Internet Pty Ltd
4755 1573 385 154 TATA Communications formerly
9829 1282 1069 30 BSNL National Internet Backbo
7552 1165 1062 11 Vietel Corporation
9583 1156 86 500 Sify Limited
4808 1114 2051 318 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 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 3414 3807 195 bellsouth.net, inc.
7029 3364 985 158 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1903 681 131 PaeTec Communications, Inc.
20115 1636 1565 620 Charter Communications
22773 1604 2911 121 Cox Communications, Inc.
4323 1575 1042 383 Time Warner Telecom
30036 1410 262 749 Mediacom Communications Corp
7018 1248 10038 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 1786 544 16 Corbina telecom
34984 694 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 679 671 69 Uni2 Autonomous System
6830 656 2215 426 UPC Distribution Services
20940 656 216 511 Akamai Technologies European
8551 566 360 80 Bezeq International
3320 485 8442 401 Deutsche Telekom AG
3292 473 2108 407 TDC Tele Danmark
8866 436 134 27 Bulgarian Telecommunication C

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 1869 334 175 TVCABLE BOGOTA
28573 1849 1137 58 NET Servicos de Comunicao S.A
6503 1523 418 65 AVANTEL, S.A.
8151 1478 3003 341 UniNet S.A. de C.V.
7303 1371 837 188 Telecom Argentina Stet-France
26615 903 761 33 Tim Brasil S.A.
27947 694 74 98 Telconet S.A
11172 642 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 576 243 98 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 1307 958 13 TEDATA
24863 845 274 35 LINKdotNET AS number
6713 496 649 18 Itissalat Al-MAGHRIB
3741 261 905 222 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
24835 179 80 8 RAYA Telecom - Egypt
16637 170 666 82 MTN Network Solutions
15706 164 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 3414 3807 195 bellsouth.net, inc.
7029 3364 985 158 Windstream Communications Inc
4766 2569 11115 1063 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
1785 1903 681 131 PaeTec Communications, Inc.
10620 1869 334 175 TVCABLE BOGOTA
17974 1868 510 73 PT TELEKOMUNIKASI INDONESIA
28573 1849 1137 58 NET Servicos de Comunicao S.A
8402 1786 544 16 Corbina telecom
7545 1680 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 3364 3206 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1868 1795 PT TELEKOMUNIKASI INDONESIA
28573 1849 1791 NET Servicos de Comunicao S.A
1785 1903 1772 PaeTec Communications, Inc.
8402 1786 1770 Corbina telecom
10620 1869 1694 TVCABLE BOGOTA
7545 1680 1593 TPG Internet Pty Ltd
4766 2569 1506 Korea Telecom (KIX)
22773 1604 1483 Cox Communications, Inc.

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
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
41.222.79.0/24 36938 >>UNKNOWN<<

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 /10:29 /11:81 /12:235
/13:460 /14:832 /15:1496 /16:12244 /17:6255 /18:10577
/19:20703 /20:29342 /21:30547 /22:39987 /23:38250 /24:212772
/25:1204 /26:1436 /27:795 /28:163 /29:67 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
7029 3023 3364 Windstream Communications Inc
6389 2133 3414 bellsouth.net, inc.
18566 2042 2093 Covad Communications
8402 1764 1786 Corbina telecom
10620 1715 1869 TVCABLE BOGOTA
30036 1351 1410 Mediacom Communications Corp
6503 1282 1523 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1108 1307 TEDATA
7011 1069 1184 Citizens Utilities

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

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

1:543 2:688 4:14 5:8 6:3 8:412
12:1999 13:1 14:612 15:12 16:3 17:5
20:23 23:167 24:1770 27:1286 31:956 32:57
33:2 34:2 36:8 37:455 38:809 40:120
41:3134 42:136 44:3 46:1406 47:3 49:403
50:548 52:13 54:10 55:9 56:3 57:32
58:960 59:482 60:255 61:1226 62:986 63:2057
64:4174 65:2245 66:4464 67:2008 68:1165 69:3212
70:906 71:484 72:1823 74:2596 75:493 76:324
77:939 78:981 79:495 80:1214 81:908 82:661
83:555 84:488 85:1222 86:437 87:918 88:334
89:1697 90:290 91:4804 92:543 93:1442 94:1519
95:1045 96:368 97:316 98:871 99:38 100:7
101:189 103:1067 106:103 107:187 108:285 109:1327
110:768 111:918 112:408 113:604 114:630 115:830
116:938 117:715 118:907 119:1236 120:353 121:690
122:1668 123:1105 124:1382 125:1249 128:559 129:194
130:252 131:627 132:177 133:22 134:248 135:62
136:214 137:178 138:334 139:183 140:493 141:243
142:415 143:436 144:525 145:70 146:495 147:288
148:773 149:303 150:158 151:177 152:469 153:172
154:12 155:401 156:221 157:381 158:183 159:546
160:338 161:261 162:347 163:189 164:588 165:386
166:572 167:468 168:858 169:126 170:860 171:131
172:2 173:1738 174:580 175:432 176:666 177:736
178:1359 180:1208 181:82 182:977 183:294 184:490
185:1 186:2283 187:1079 188:1278 189:1792 190:5514
192:5997 193:5298 194:3804 195:3213 196:1279 197:136
198:3636 199:4619 200:5853 201:1935 202:8558 203:8613
204:4336 205:2521 206:2762 207:2798 208:4075 209:3615
210:2742 211:1509 212:2025 213:1937 214:853 215:103
216:5094 217:1538 218:545 219:313 220:1232 221:558
222:322 223:341

End of report
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