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, June 6, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 07 Jun, 2012

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

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

BGP routing table entries examined: 412942
Prefixes after maximum aggregation: 174945
Deaggregation factor: 2.36
Unique aggregates announced to Internet: 201524
Total ASes present in the Internet Routing Table: 41240
Prefixes per ASN: 10.01
Origin-only ASes present in the Internet Routing Table: 33280
Origin ASes announcing only one prefix: 15667
Transit ASes present in the Internet Routing Table: 5507
Transit-only ASes present in the Internet Routing Table: 140
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 28
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 393
Unregistered ASNs in the Routing Table: 137
Number of 32-bit ASNs allocated by the RIRs: 2802
Number of 32-bit ASNs visible in the Routing Table: 2453
Prefixes from 32-bit ASNs in the Routing Table: 6203
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 112
Number of addresses announced to Internet: 2561259820
Equivalent to 152 /8s, 169 /16s and 185 /24s
Percentage of available address space announced: 69.1
Percentage of allocated address space announced: 69.2
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.8
Total number of prefixes smaller than registry allocations: 171589

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

Prefixes being announced by APNIC Region ASes: 100567
Total APNIC prefixes after maximum aggregation: 32571
APNIC Deaggregation factor: 3.09
Prefixes being announced from the APNIC address blocks: 97023
Unique aggregates announced from the APNIC address blocks: 40252
APNIC Region origin ASes present in the Internet Routing Table: 4697
APNIC Prefixes per ASN: 20.66
APNIC Region origin ASes announcing only one prefix: 1247
APNIC Region transit ASes present in the Internet Routing Table: 738
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 225
Number of APNIC addresses announced to Internet: 648403264
Equivalent to 38 /8s, 165 /16s and 217 /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, 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: 151703
Total ARIN prefixes after maximum aggregation: 77144
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 122097
Unique aggregates announced from the ARIN address blocks: 51396
ARIN Region origin ASes present in the Internet Routing Table: 15159
ARIN Prefixes per ASN: 8.05
ARIN Region origin ASes announcing only one prefix: 5755
ARIN Region transit ASes present in the Internet Routing Table: 1602
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: 816809408
Equivalent to 48 /8s, 175 /16s and 133 /24s
Percentage of available ARIN address space announced: 65.1

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: 102985
Total RIPE prefixes after maximum aggregation: 54726
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 94938
Unique aggregates announced from the RIPE address blocks: 59753
RIPE Region origin ASes present in the Internet Routing Table: 16615
RIPE Prefixes per ASN: 5.71
RIPE Region origin ASes announcing only one prefix: 8065
RIPE Region transit ASes present in the Internet Routing Table: 2657
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: 1621
Number of RIPE addresses announced to Internet: 515385604
Equivalent to 30 /8s, 184 /16s and 41 /24s
Percentage of available RIPE address space announced: 83.0

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,
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: 41938
Total LACNIC prefixes after maximum aggregation: 8286
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 42109
Unique aggregates announced from the LACNIC address blocks: 20614
LACNIC Region origin ASes present in the Internet Routing Table: 1598
LACNIC Prefixes per ASN: 26.35
LACNIC Region origin ASes announcing only one prefix: 433
LACNIC Region transit ASes present in the Internet Routing Table: 302
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 19
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 585
Number of LACNIC addresses announced to Internet: 101854600
Equivalent to 6 /8s, 18 /16s and 45 /24s
Percentage of available LACNIC address space announced: 67.5

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: 9359
Total AfriNIC prefixes after maximum aggregation: 2152
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 7405
Unique aggregates announced from the AfriNIC address blocks: 2160
AfriNIC Region origin ASes present in the Internet Routing Table: 541
AfriNIC Prefixes per ASN: 13.69
AfriNIC Region origin ASes announcing only one prefix: 167
AfriNIC Region transit ASes present in the Internet Routing Table: 119
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: 5
Number of AfriNIC addresses announced to Internet: 31787264
Equivalent to 1 /8s, 229 /16s and 9 /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 2637 11113 1122 Korea Telecom (KIX)
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
7545 1683 301 87 TPG Internet Pty Ltd
4755 1577 385 155 TATA Communications formerly
9829 1304 1085 28 BSNL National Internet Backbo
9583 1209 90 521 Sify Limited
7552 1167 1062 11 Vietel Corporation
4808 1102 2049 314 CNCGROUP IP network: China169
24560 1028 385 165 Bharti Airtel Ltd., Telemedia
9498 964 291 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 3409 3791 192 bellsouth.net, inc.
7029 3343 986 159 Windstream Communications Inc
18566 2091 382 181 Covad Communications
1785 1913 680 130 PaeTec Communications, Inc.
20115 1647 1570 616 Charter Communications
22773 1638 2911 121 Cox Communications, Inc.
4323 1573 1043 384 Time Warner Telecom
30036 1423 265 753 Mediacom Communications Corp
7018 1225 10031 825 AT&T WorldNet Services
7011 1188 317 681 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 1770 544 16 Corbina telecom
2118 1226 97 14 EUnet/RELCOM Autonomous Syste
34984 704 188 171 BILISIM TELEKOM
12479 700 683 72 Uni2 Autonomous System
31148 684 37 9 FreeNet ISP
20940 669 221 522 Akamai Technologies European
6830 657 2217 426 UPC Distribution Services
8551 579 364 61 Bezeq International
3320 489 8442 402 Deutsche Telekom AG
3292 473 2108 407 TDC Tele Danmark

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 1926 341 204 TVCABLE BOGOTA
28573 1924 1184 48 NET Servicos de Comunicao S.A
6503 1533 418 65 AVANTEL, S.A.
8151 1488 3068 336 UniNet S.A. de C.V.
7303 1436 901 192 Telecom Argentina Stet-France
26615 902 760 32 Tim Brasil S.A.
27947 693 73 94 Telconet S.A
11172 644 91 73 Servicios Alestra S.A de C.V
3816 584 246 93 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 1425 958 13 TEDATA
24863 854 274 35 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
24835 321 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 168 666 85 MTN Network Solutions
29571 157 15 16 Ci Telecom Autonomous system
36923 157 20 4 Swift Networks Limited

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 3409 3791 192 bellsouth.net, inc.
7029 3343 986 159 Windstream Communications Inc
4766 2637 11113 1122 Korea Telecom (KIX)
18566 2091 382 181 Covad Communications
17974 1928 530 81 PT TELEKOMUNIKASI INDONESIA
10620 1926 341 204 TVCABLE BOGOTA
28573 1924 1184 48 NET Servicos de Comunicao S.A
1785 1913 680 130 PaeTec Communications, Inc.
8402 1770 544 16 Corbina telecom
7545 1683 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 3343 3184 Windstream Communications Inc
18566 2091 1910 Covad Communications
28573 1924 1876 NET Servicos de Comunicao S.A
17974 1928 1847 PT TELEKOMUNIKASI INDONESIA
1785 1913 1783 PaeTec Communications, Inc.
8402 1770 1754 Corbina telecom
10620 1926 1722 TVCABLE BOGOTA
7545 1683 1596 TPG Internet Pty Ltd
22773 1638 1517 Cox Communications, Inc.
4766 2637 1515 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
32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser
32873 UNALLOCATED 12.46.102.0/24 10912 InterNAP Network Ser
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
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
5.60.0.0/16 8374 Polkomtel S.A.
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

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 /11:82 /12:236
/13:461 /14:831 /15:1504 /16:12304 /17:6303 /18:10624
/19:20800 /20:29508 /21:31015 /22:40750 /23:38530 /24:216147
/25:1234 /26:1451 /27:826 /28:172 /29:66 /30:16
/31:0 /32:22

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

ASN No of nets Total ann. Description
7029 3001 3343 Windstream Communications Inc
6389 2129 3409 bellsouth.net, inc.
18566 2040 2091 Covad Communications
8402 1748 1770 Corbina telecom
30036 1363 1423 Mediacom Communications Corp
8452 1226 1425 TEDATA
6503 1223 1533 AVANTEL, S.A.
11492 1151 1188 Cable One
22773 1083 1638 Cox Communications, Inc.
7011 1073 1188 Citizens Utilities

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

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

1:555 2:758 3:1 4:13 5:50 6:3
8:425 12:2013 13:1 14:620 15:12 16:3
17:5 20:23 23:175 24:1777 27:1284 31:987
32:56 33:2 34:2 36:9 37:675 38:811
40:125 41:3254 42:135 44:3 46:1432 47:3
49:394 50:555 52:13 54:12 55:12 56:1
57:33 58:959 59:498 60:259 61:1210 62:981
63:2007 64:4233 65:2249 66:4451 67:2026 68:1156
69:3177 70:953 71:508 72:1821 74:2600 75:488
76:327 77:954 78:984 79:488 80:1241 81:939
82:662 83:545 84:492 85:1193 86:434 87:909
88:337 89:1725 90:293 91:4903 92:557 93:1404
94:1580 95:1218 96:363 97:314 98:906 99:38
100:7 101:261 103:1130 106:95 107:186 108:320
109:1364 110:769 111:919 112:416 113:609 114:627
115:845 116:954 117:718 118:921 119:1232 120:354
121:698 122:1667 123:1098 124:1388 125:1260 128:554
129:202 130:249 131:632 132:289 133:22 134:244
135:61 136:215 137:240 138:358 139:186 140:493
141:252 142:415 143:418 144:541 145:72 146:508
147:286 148:776 149:310 150:164 151:177 152:469
153:173 154:14 155:443 156:221 157:381 158:187
159:577 160:344 161:264 162:347 163:190 164:638
165:404 166:592 167:470 168:863 169:126 170:874
171:136 172:4 173:1766 174:621 175:433 176:546
177:816 178:1393 180:1224 181:87 182:1050 183:227
184:526 185:1 186:2310 187:1119 188:1315 189:1821
190:5581 192:6005 193:5517 194:4529 195:3386 196:1209
197:146 198:3662 199:4748 200:5892 201:1942 202:8615
203:8560 204:4341 205:2523 206:2775 207:2800 208:4012
209:3617 210:2762 211:1548 212:2022 213:1937 214:878
215:98 216:5089 217:1555 218:553 219:313 220:1238
221:570 222:316 223:320

End of report
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