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, December 12, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 13 Dec, 2012

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

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

BGP routing table entries examined: 436801
Prefixes after maximum aggregation: 180577
Deaggregation factor: 2.42
Unique aggregates announced to Internet: 214417
Total ASes present in the Internet Routing Table: 42822
Prefixes per ASN: 10.20
Origin-only ASes present in the Internet Routing Table: 33936
Origin ASes announcing only one prefix: 15869
Transit ASes present in the Internet Routing Table: 5686
Transit-only ASes present in the Internet Routing Table: 131
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 30
Max AS path prepend of ASN ( 28730) 25
Prefixes from unregistered ASNs in the Routing Table: 1186
Unregistered ASNs in the Routing Table: 427
Number of 32-bit ASNs allocated by the RIRs: 3575
Number of 32-bit ASNs visible in the Routing Table: 3200
Prefixes from 32-bit ASNs in the Routing Table: 8640
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 154
Number of addresses announced to Internet: 2619317836
Equivalent to 156 /8s, 31 /16s and 158 /24s
Percentage of available address space announced: 70.7
Percentage of allocated address space announced: 70.7
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.0
Total number of prefixes smaller than registry allocations: 154521

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

Prefixes being announced by APNIC Region ASes: 104869
Total APNIC prefixes after maximum aggregation: 32638
APNIC Deaggregation factor: 3.21
Prefixes being announced from the APNIC address blocks: 105789
Unique aggregates announced from the APNIC address blocks: 43300
APNIC Region origin ASes present in the Internet Routing Table: 4804
APNIC Prefixes per ASN: 22.02
APNIC Region origin ASes announcing only one prefix: 1247
APNIC Region transit ASes present in the Internet Routing Table: 794
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 385
Number of APNIC addresses announced to Internet: 716069120
Equivalent to 42 /8s, 174 /16s and 89 /24s
Percentage of available APNIC address space announced: 83.7

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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: 155715
Total ARIN prefixes after maximum aggregation: 78430
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 156412
Unique aggregates announced from the ARIN address blocks: 70205
ARIN Region origin ASes present in the Internet Routing Table: 15334
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5792
ARIN Region transit ASes present in the Internet Routing Table: 1593
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 25
Number of ARIN region 32-bit ASNs visible in the Routing Table: 18
Number of ARIN addresses announced to Internet: 1089120640
Equivalent to 64 /8s, 234 /16s and 169 /24s
Percentage of available ARIN address space announced: 57.6

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: 112442
Total RIPE prefixes after maximum aggregation: 58105
RIPE Deaggregation factor: 1.94
Prefixes being announced from the RIPE address blocks: 115310
Unique aggregates announced from the RIPE address blocks: 74056
RIPE Region origin ASes present in the Internet Routing Table: 16990
RIPE Prefixes per ASN: 6.79
RIPE Region origin ASes announcing only one prefix: 8137
RIPE Region transit ASes present in the Internet Routing Table: 2755
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: 2068
Number of RIPE addresses announced to Internet: 650222500
Equivalent to 38 /8s, 193 /16s and 155 /24s
Percentage of available RIPE address space announced: 94.5

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: 45203
Total LACNIC prefixes after maximum aggregation: 8986
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 48729
Unique aggregates announced from the LACNIC address blocks: 23073
LACNIC Region origin ASes present in the Internet Routing Table: 1748
LACNIC Prefixes per ASN: 27.88
LACNIC Region origin ASes announcing only one prefix: 505
LACNIC Region transit ASes present in the Internet Routing Table: 328
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 723
Number of LACNIC addresses announced to Internet: 120672808
Equivalent to 7 /8s, 49 /16s and 82 /24s
Percentage of available LACNIC address space announced: 71.9

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: 9816
Total AfriNIC prefixes after maximum aggregation: 2365
AfriNIC Deaggregation factor: 4.15
Prefixes being announced from the AfriNIC address blocks: 10407
Unique aggregates announced from the AfriNIC address blocks: 3648
AfriNIC Region origin ASes present in the Internet Routing Table: 584
AfriNIC Prefixes per ASN: 17.82
AfriNIC Region origin ASes announcing only one prefix: 188
AfriNIC Region transit ASes present in the Internet Routing Table: 127
Average AfriNIC Region AS path length visible: 4.6
Max AfriNIC Region AS path length visible: 16
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 42900736
Equivalent to 2 /8s, 142 /16s and 157 /24s
Percentage of available AfriNIC address space announced: 42.6

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 2921 11555 897 Korea Telecom (KIX)
17974 2432 826 46 PT TELEKOMUNIKASI INDONESIA
7545 1815 301 90 TPG Internet Pty Ltd
4755 1652 381 171 TATA Communications formerly
9829 1376 1155 41 BSNL National Internet Backbo
9583 1180 88 498 Sify Limited
7552 1140 1062 11 Vietel Corporation
4808 1128 2056 318 CNCGROUP IP network: China169
24560 1035 385 165 Bharti Airtel Ltd., Telemedia
9498 1028 307 70 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 3191 994 214 Windstream Communications Inc
6389 3129 3718 140 bellsouth.net, inc.
18566 2082 382 180 Covad Communications
22773 1941 2932 131 Cox Communications, Inc.
1785 1938 678 124 PaeTec Communications, Inc.
20115 1686 1606 629 Charter Communications
4323 1591 1153 396 Time Warner Telecom
30036 1380 290 722 Mediacom Communications Corp
7018 1290 10534 854 AT&T WorldNet Services
7011 1214 322 691 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 1781 544 16 Corbina telecom
2118 1424 97 15 EUnet/RELCOM Autonomous Syste
34984 872 211 223 BILISIM TELEKOM
12479 867 777 64 Uni2 Autonomous System
13188 754 95 131 Educational Network
31148 740 38 13 FreeNet ISP
6830 715 2313 436 UPC Distribution Services
20940 712 230 549 Akamai Technologies European
58113 613 68 372 LIR DATACENTER TELECOM SRL
8551 611 367 39 Bezeq International

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 2262 386 206 TVCABLE BOGOTA
28573 2211 1298 69 NET Servicos de Comunicao S.A
7303 1671 1138 202 Telecom Argentina Stet-France
8151 1604 3028 356 UniNet S.A. de C.V.
6503 1537 435 67 AVANTEL, S.A.
27947 759 85 93 Telconet S.A
3816 661 309 71 Empresa Nacional de Telecomun
18881 605 716 18 Global Village Telecom
11172 603 85 68 Servicios Alestra S.A de C.V
7738 579 1178 33 Telecomunicacoes da Bahia 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
24863 870 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 654 958 13 TEDATA
6713 497 602 20 Itissalat Al-MAGHRIB
24835 291 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
29571 169 15 19 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 3191 994 214 Windstream Communications Inc
6389 3129 3718 140 bellsouth.net, inc.
4766 2921 11555 897 Korea Telecom (KIX)
17974 2432 826 46 PT TELEKOMUNIKASI INDONESIA
10620 2262 386 206 TVCABLE BOGOTA
28573 2211 1298 69 NET Servicos de Comunicao S.A
18566 2082 382 180 Covad Communications
22773 1941 2932 131 Cox Communications, Inc.
1785 1938 678 124 PaeTec Communications, Inc.
7545 1815 301 90 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
6389 3129 2989 bellsouth.net, inc.
17974 2432 2386 PT TELEKOMUNIKASI INDONESIA
28573 2211 2142 NET Servicos de Comunicao S.A
10620 2262 2056 TVCABLE BOGOTA
4766 2921 2024 Korea Telecom (KIX)
18566 2082 1902 Covad Communications
1785 1938 1814 PaeTec Communications, Inc.
22773 1941 1810 Cox Communications, Inc.
8402 1781 1765 Corbina telecom
7545 1815 1725 TPG Internet Pty Ltd

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
61309 UNALLOCATED 5.1.96.0/21 41562 Host4all Sarl
59505 UNALLOCATED 5.2.65.0/24 50673 Serverius AS
59505 UNALLOCATED 5.2.66.0/24 50673 Serverius AS
59530 UNALLOCATED 5.8.182.0/24 31261 GARS Telecom
61408 UNALLOCATED 5.56.0.0/21 174 Cogent Communication
61395 UNALLOCATED 5.83.56.0/22 3292 TDC Tele Danmark
61395 UNALLOCATED 5.83.60.0/22 3292 TDC Tele Danmark
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 3549 Global Crossing
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
128.0.0.0/24 2876 Jump Management SRL
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
27.112.114.0/24 23884 Proimage Engineering and Comm
41.222.80.0/21 37110 Moztel LDA
41.223.108.0/22 36966 >>UNKNOWN<<
62.12.96.0/19 38478 SunnyVision Limited
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
64.66.32.0/20 18864 >>UNKNOWN<<
64.187.208.0/24 174 Cogent Communications
64.187.209.0/24 23005 Power Pulse
65.111.1.0/24 32258 SDN Global

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 /8:18 /9:13 /10:29 /11:87 /12:244
/13:477 /14:857 /15:1550 /16:12475 /17:6569 /18:10968
/19:21584 /20:30878 /21:32877 /22:44071 /23:40702 /24:229125
/25:1357 /26:1747 /27:866 /28:185 /29:80 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2622 3191 Windstream Communications Inc
18566 2032 2082 Covad Communications
6389 1775 3129 bellsouth.net, inc.
8402 1508 1781 Corbina telecom
30036 1288 1380 Mediacom Communications Corp
22773 1275 1941 Cox Communications, Inc.
11492 1147 1183 Cable One
6503 1055 1537 AVANTEL, S.A.
1785 1022 1938 PaeTec Communications, Inc.
7011 953 1214 Citizens Utilities

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

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

1:646 2:728 3:1 4:13 5:683 6:3
8:487 12:1945 13:3 14:704 15:11 16:3
17:6 20:27 23:219 24:1792 27:1435 31:1319
32:54 33:2 34:2 36:7 37:1080 38:843
39:2 40:141 41:2748 42:179 44:3 46:1711
47:3 49:512 50:627 52:12 54:28 55:7
57:28 58:1067 59:552 60:234 61:1310 62:1006
63:2019 64:4364 65:2206 66:4486 67:2083 68:1186
69:3272 70:934 71:557 72:1895 74:2630 75:478
76:292 77:1035 78:991 79:516 80:1206 81:975
82:630 83:532 84:532 85:1143 86:460 87:958
88:353 89:1742 90:305 91:5351 92:584 93:1648
94:1987 95:1631 96:457 97:322 98:971 99:40
100:31 101:286 103:1918 105:517 106:117 107:203
108:492 109:1716 110:821 111:976 112:458 113:743
114:641 115:897 116:886 117:776 118:958 119:1256
120:379 121:679 122:1725 123:1168 124:1322 125:1283
128:552 129:198 130:296 131:621 132:313 133:142
134:256 135:62 136:214 137:235 138:343 139:166
140:171 141:301 142:511 143:355 144:490 145:81
146:509 147:267 148:737 149:332 150:153 151:238
152:399 153:187 154:22 155:443 156:231 157:380
158:256 159:678 160:335 161:421 162:377 163:193
164:585 165:451 166:476 167:566 168:989 169:131
170:1002 171:164 172:6 173:1702 174:641 175:443
176:874 177:1452 178:1742 180:1354 181:182 182:1123
183:304 184:631 185:123 186:2118 187:1444 188:1881
189:1618 190:6170 192:6094 193:5812 194:4647 195:3642
196:1250 197:284 198:3989 199:5133 200:6027 201:2009
202:8813 203:8733 204:4455 205:2566 206:2757 207:2815
208:4070 209:3654 210:2897 211:1531 212:2100 213:1854
214:892 215:74 216:5174 217:1598 218:595 219:321
220:1258 221:542 222:336 223:364

End of report
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