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.

Thursday, July 5, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 06 Jul, 2012

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

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

BGP routing table entries examined: 415892
Prefixes after maximum aggregation: 175598
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 202628
Total ASes present in the Internet Routing Table: 41423
Prefixes per ASN: 10.04
Origin-only ASes present in the Internet Routing Table: 33308
Origin ASes announcing only one prefix: 15666
Transit ASes present in the Internet Routing Table: 5553
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: 27
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 393
Unregistered ASNs in the Routing Table: 124
Number of 32-bit ASNs allocated by the RIRs: 2935
Number of 32-bit ASNs visible in the Routing Table: 2562
Prefixes from 32-bit ASNs in the Routing Table: 6629
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 156
Number of addresses announced to Internet: 2572849196
Equivalent to 153 /8s, 90 /16s and 144 /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: 143992

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

Prefixes being announced by APNIC Region ASes: 101802
Total APNIC prefixes after maximum aggregation: 32706
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 102254
Unique aggregates announced from the APNIC address blocks: 42078
APNIC Region origin ASes present in the Internet Routing Table: 4716
APNIC Prefixes per ASN: 21.68
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 751
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: 244
Number of APNIC addresses announced to Internet: 703932032
Equivalent to 41 /8s, 245 /16s and 38 /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: 152274
Total ARIN prefixes after maximum aggregation: 77361
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153226
Unique aggregates announced from the ARIN address blocks: 68382
ARIN Region origin ASes present in the Internet Routing Table: 15182
ARIN Prefixes per ASN: 10.09
ARIN Region origin ASes announcing only one prefix: 5750
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: 17
Number of ARIN addresses announced to Internet: 1081033344
Equivalent to 64 /8s, 111 /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: 103698
Total RIPE prefixes after maximum aggregation: 55042
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 105889
Unique aggregates announced from the RIPE address blocks: 67141
RIPE Region origin ASes present in the Internet Routing Table: 16636
RIPE Prefixes per ASN: 6.37
RIPE Region origin ASes announcing only one prefix: 8071
RIPE Region transit ASes present in the Internet Routing Table: 2684
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 27
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1691
Number of RIPE addresses announced to Internet: 635277444
Equivalent to 37 /8s, 221 /16s and 144 /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: 42048
Total LACNIC prefixes after maximum aggregation: 8310
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 44668
Unique aggregates announced from the LACNIC address blocks: 21654
LACNIC Region origin ASes present in the Internet Routing Table: 1606
LACNIC Prefixes per ASN: 27.81
LACNIC Region origin ASes announcing only one prefix: 430
LACNIC Region transit ASes present in the Internet Routing Table: 311
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: 111779496
Equivalent to 6 /8s, 169 /16s and 158 /24s
Percentage of available LACNIC address space announced: 66.6

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: 9242
Total AfriNIC prefixes after maximum aggregation: 2125
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 9699
Unique aggregates announced from the AfriNIC address blocks: 3238
AfriNIC Region origin ASes present in the Internet Routing Table: 553
AfriNIC Prefixes per ASN: 17.54
AfriNIC Region origin ASes announcing only one prefix: 174
AfriNIC Region transit ASes present in the Internet Routing Table: 125
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: 4
Number of AfriNIC addresses announced to Internet: 40509952
Equivalent to 2 /8s, 106 /16s and 34 /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 2703 11118 1206 Korea Telecom (KIX)
17974 2105 542 77 PT TELEKOMUNIKASI INDONESIA
7545 1690 301 87 TPG Internet Pty Ltd
4755 1612 388 162 TATA Communications formerly
9829 1304 1085 28 BSNL National Internet Backbo
9583 1165 87 507 Sify Limited
7552 1124 1062 11 Vietel Corporation
4808 1100 2053 318 CNCGROUP IP network: China169
24560 1035 385 165 Bharti Airtel Ltd., Telemedia
9498 978 291 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 3392 3789 188 bellsouth.net, inc.
7029 3254 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 1399 266 772 Mediacom Communications Corp
7018 1257 10029 824 AT&T WorldNet Services
11492 1190 216 356 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 1694 544 16 Corbina telecom
2118 1288 97 14 EUnet/RELCOM Autonomous Syste
12479 782 731 91 Uni2 Autonomous System
34984 724 189 175 BILISIM TELEKOM
6830 711 2292 445 UPC Distribution Services
31148 694 37 9 FreeNet ISP
20940 690 223 530 Akamai Technologies European
8551 579 364 61 Bezeq International
13188 504 100 10 Educational Network
3320 495 8443 407 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 1946 1214 55 NET Servicos de Comunicao S.A
6503 1532 418 66 AVANTEL, S.A.
8151 1493 3066 342 UniNet S.A. de C.V.
7303 1453 933 193 Telecom Argentina Stet-France
27947 709 74 94 Telconet S.A
11172 643 91 74 Servicios Alestra S.A de C.V
3816 589 246 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 1223 958 13 TEDATA
24863 864 274 32 LINKdotNET AS number
6713 504 649 18 Itissalat Al-MAGHRIB
24835 286 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
16637 167 664 87 MTN Network Solutions
29975 167 571 19 Vodacom
15706 159 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 3392 3789 188 bellsouth.net, inc.
7029 3254 986 157 Windstream Communications Inc
4766 2703 11118 1206 Korea Telecom (KIX)
17974 2105 542 77 PT TELEKOMUNIKASI INDONESIA
18566 2090 382 180 Covad Communications
10620 1983 345 204 TVCABLE BOGOTA
28573 1946 1214 55 NET Servicos de Comunicao S.A
1785 1930 681 132 PaeTec Communications, Inc.
8402 1694 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 3254 3097 Windstream Communications Inc
17974 2105 2028 PT TELEKOMUNIKASI INDONESIA
18566 2090 1910 Covad Communications
28573 1946 1891 NET Servicos de Comunicao S.A
1785 1930 1798 PaeTec Communications, Inc.
10620 1983 1779 TVCABLE BOGOTA
8402 1694 1678 Corbina telecom
7545 1690 1603 TPG Internet Pty Ltd
22773 1656 1535 Cox Communications, Inc.
4766 2703 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
5.133.8.0/21 23456 32-bit ASN transition
5.133.64.0/18 50673 Serverius AS
5.133.128.0/19 20875 HPT Mostar
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 /9:13 /10:28 /11:83 /12:236
/13:468 /14:841 /15:1523 /16:12298 /17:6379 /18:10771
/19:20898 /20:29685 /21:31413 /22:41132 /23:39044 /24:217226
/25:1229 /26:1473 /27:858 /28:169 /29:65 /30:18
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2631 3254 Windstream Communications Inc
18566 2040 2090 Covad Communications
6389 1871 3392 bellsouth.net, inc.
8402 1390 1694 Corbina telecom
30036 1336 1399 Mediacom Communications Corp
11492 1153 1190 Cable One
22773 1087 1656 Cox Communications, Inc.
6503 1059 1532 AVANTEL, S.A.
1785 1041 1930 PaeTec Communications, Inc.
8452 998 1223 TEDATA

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

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

1:574 2:754 3:1 4:13 5:128 6:3
8:432 12:2008 13:1 14:635 15:12 16:3
17:5 20:24 23:180 24:1790 27:1316 31:1001
32:56 33:2 34:2 36:9 37:585 38:816
39:1 40:128 41:3133 42:142 44:3 46:1454
47:2 49:417 50:547 52:13 54:13 55:7
56:1 57:34 58:975 59:529 60:248 61:1301
62:968 63:2036 64:4260 65:2256 66:4470 67:2052
68:1154 69:3191 70:981 71:510 72:1837 74:2598
75:475 76:331 77:924 78:886 79:487 80:1205
81:946 82:662 83:526 84:492 85:1167 86:430
87:934 88:341 89:1748 90:304 91:4997 92:572
93:1284 94:1594 95:1258 96:379 97:318 98:897
99:39 100:19 101:253 103:1231 106:101 107:188
108:362 109:1416 110:782 111:941 112:420 113:634
114:649 115:903 116:930 117:731 118:924 119:1231
120:351 121:808 122:1672 123:1096 124:1397 125:1259
128:553 129:188 130:264 131:635 132:300 133:22
134:244 135:61 136:216 137:239 138:337 139:177
140:493 141:253 142:432 143:371 144:529 145:78
146:507 147:288 148:772 149:318 150:157 151:181
152:474 153:176 154:17 155:433 156:220 157:382
158:191 159:622 160:342 161:268 162:372 163:191
164:650 165:415 166:584 167:479 168:912 169:126
170:891 171:145 172:5 173:1723 174:614 175:437
176:558 177:921 178:1535 180:1288 181:99 182:1024
183:245 184:533 185:1 186:1916 187:1079 188:1357
189:1610 190:5762 192:6010 193:5522 194:4531 195:3448
196:1216 197:170 198:3671 199:4842 200:5920 201:1981
202:8690 203:8638 204:4330 205:2534 206:2803 207:2799
208:4035 209:3616 210:2790 211:1555 212:1997 213:1842
214:875 215:81 216:5077 217:1551 218:551 219:338
220:1238 221:568 222:335 223:355

End of report
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