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, September 9, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 10 Sep, 2013

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

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

BGP routing table entries examined: 466408
Prefixes after maximum aggregation: 188295
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 231795
Total ASes present in the Internet Routing Table: 44925
Prefixes per ASN: 10.38
Origin-only ASes present in the Internet Routing Table: 35108
Origin ASes announcing only one prefix: 16253
Transit ASes present in the Internet Routing Table: 5904
Transit-only ASes present in the Internet Routing Table: 162
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 5732
Unregistered ASNs in the Routing Table: 1963
Number of 32-bit ASNs allocated by the RIRs: 5010
Number of 32-bit ASNs visible in the Routing Table: 3913
Prefixes from 32-bit ASNs in the Routing Table: 12044
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 385
Number of addresses announced to Internet: 2641555636
Equivalent to 157 /8s, 114 /16s and 240 /24s
Percentage of available address space announced: 71.3
Percentage of allocated address space announced: 71.3
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.0
Total number of prefixes smaller than registry allocations: 163285

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

Prefixes being announced by APNIC Region ASes: 110545
Total APNIC prefixes after maximum aggregation: 33537
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 112496
Unique aggregates announced from the APNIC address blocks: 46551
APNIC Region origin ASes present in the Internet Routing Table: 4868
APNIC Prefixes per ASN: 23.11
APNIC Region origin ASes announcing only one prefix: 1220
APNIC Region transit ASes present in the Internet Routing Table: 829
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: 665
Number of APNIC addresses announced to Internet: 727710656
Equivalent to 43 /8s, 95 /16s and 251 /24s
Percentage of available APNIC address space announced: 85.0

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: 161384
Total ARIN prefixes after maximum aggregation: 81078
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 161974
Unique aggregates announced from the ARIN address blocks: 75473
ARIN Region origin ASes present in the Internet Routing Table: 15863
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 6014
ARIN Region transit ASes present in the Internet Routing Table: 1658
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 20
Number of ARIN addresses announced to Internet: 1071503104
Equivalent to 63 /8s, 221 /16s and 215 /24s
Percentage of available ARIN address space announced: 56.7

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, 62464-63487, 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: 119721
Total RIPE prefixes after maximum aggregation: 61273
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123562
Unique aggregates announced from the RIPE address blocks: 79568
RIPE Region origin ASes present in the Internet Routing Table: 17416
RIPE Prefixes per ASN: 7.09
RIPE Region origin ASes announcing only one prefix: 8251
RIPE Region transit ASes present in the Internet Routing Table: 2818
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2393
Number of RIPE addresses announced to Internet: 657409508
Equivalent to 39 /8s, 47 /16s and 69 /24s
Percentage of available RIPE address space announced: 95.6

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: 50928
Total LACNIC prefixes after maximum aggregation: 9799
LACNIC Deaggregation factor: 5.20
Prefixes being announced from the LACNIC address blocks: 55679
Unique aggregates announced from the LACNIC address blocks: 25897
LACNIC Region origin ASes present in the Internet Routing Table: 2015
LACNIC Prefixes per ASN: 27.63
LACNIC Region origin ASes announcing only one prefix: 571
LACNIC Region transit ASes present in the Internet Routing Table: 378
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 829
Number of LACNIC addresses announced to Internet: 137577232
Equivalent to 8 /8s, 51 /16s and 67 /24s
Percentage of available LACNIC address space announced: 82.0

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 262144-263679 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: 11694
Total AfriNIC prefixes after maximum aggregation: 2557
AfriNIC Deaggregation factor: 4.57
Prefixes being announced from the AfriNIC address blocks: 12312
Unique aggregates announced from the AfriNIC address blocks: 3948
AfriNIC Region origin ASes present in the Internet Routing Table: 651
AfriNIC Prefixes per ASN: 18.91
AfriNIC Region origin ASes announcing only one prefix: 197
AfriNIC Region transit ASes present in the Internet Routing Table: 135
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 46569728
Equivalent to 2 /8s, 198 /16s and 153 /24s
Percentage of available AfriNIC address space announced: 46.3

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 2919 11561 924 Korea Telecom (KIX)
17974 2657 903 90 PT TELEKOMUNIKASI INDONESIA
7545 2068 321 112 TPG Internet Pty Ltd
4755 1770 390 190 TATA Communications formerly
9829 1549 1237 45 BSNL National Internet Backbo
9583 1229 92 508 Sify Limited
9498 1184 309 70 BHARTI Airtel Ltd.
4808 1161 2129 343 CNCGROUP IP network: China169
7552 1155 1080 13 Vietel Corporation
24560 1089 394 163 Bharti Airtel Ltd., Telemedia

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 3068 3689 62 bellsouth.net, inc.
18566 2065 382 184 Covad Communications
22773 2041 2933 125 Cox Communications, Inc.
1785 2013 679 125 PaeTec Communications, Inc.
20115 1678 1648 628 Charter Communications
4323 1616 1103 409 Time Warner Telecom
701 1521 11135 797 UUNET Technologies, Inc.
30036 1344 303 640 Mediacom Communications Corp
7018 1311 11277 825 AT&T WorldNet Services
11492 1220 218 366 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 1755 544 16 Corbina telecom
34984 1321 244 221 BILISIM TELEKOM
2118 1164 97 13 EUnet/RELCOM Autonomous Syste
20940 997 359 767 Akamai Technologies European
31148 982 43 18 FreeNet ISP
6830 894 2367 426 UPC Distribution Services
13188 849 99 71 Educational Network
8551 748 370 41 Bezeq International
12479 688 797 53 Uni2 Autonomous System
58113 541 55 339 LIR DATACENTER TELECOM SRL

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
28573 3245 1720 96 NET Servicos de Comunicao S.A
10620 2549 416 259 TVCABLE BOGOTA
7303 1701 1126 222 Telecom Argentina Stet-France
18881 1430 844 20 Global Village Telecom
8151 1288 2776 391 UniNet S.A. de C.V.
11830 865 364 15 Instituto Costarricense de El
27947 839 94 92 Telconet S.A
6503 812 434 64 AVANTEL, S.A.
7738 764 1498 36 Telecomunicacoes da Bahia S.A
3816 723 302 83 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
36998 1861 112 5 MOBITEL
24863 866 274 30 LINKdotNET AS number
6713 543 633 26 Itissalat Al-MAGHRIB
8452 432 956 9 TEDATA
24835 291 80 8 RAYA Telecom - Egypt
3741 257 921 216 The Internet Solution
36992 222 501 28 Etisalat MISR
15706 221 32 6 Sudatel Internet Exchange Aut
29571 221 17 12 Ci Telecom Autonomous system
12258 193 28 71 Vodacom Internet Company

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
28573 3245 1720 96 NET Servicos de Comunicao S.A
6389 3068 3689 62 bellsouth.net, inc.
4766 2919 11561 924 Korea Telecom (KIX)
17974 2657 903 90 PT TELEKOMUNIKASI INDONESIA
10620 2549 416 259 TVCABLE BOGOTA
7545 2068 321 112 TPG Internet Pty Ltd
18566 2065 382 184 Covad Communications
22773 2041 2933 125 Cox Communications, Inc.
1785 2013 679 125 PaeTec Communications, Inc.
36998 1861 112 5 MOBITEL

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 3068 3006 bellsouth.net, inc.
17974 2657 2567 PT TELEKOMUNIKASI INDONESIA
10620 2549 2290 TVCABLE BOGOTA
4766 2919 1995 Korea Telecom (KIX)
7545 2068 1956 TPG Internet Pty Ltd
22773 2041 1916 Cox Communications, Inc.
1785 2013 1888 PaeTec Communications, Inc.
18566 2065 1881 Covad Communications
36998 1861 1856 MOBITEL
8402 1755 1739 Corbina telecom

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
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T WorldNet Servic
62719 UNALLOCATED 12.27.130.0/24 4323 Time Warner Telecom
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 12.45.103.0/24 209 Qwest
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

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

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

Prefix Origin AS Description
100.100.0.0/24 4847 China Networks Inter-Exchange

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

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

Network Origin AS Description
23.90.128.0/18 27418 OUTOFWALL INC.
23.90.192.0/18 36086 Broad Communications Technolo
23.91.0.0/19 40676 Psychz Networks
23.91.32.0/19 36315 Servpac Inc.
23.91.96.0/20 40676 Psychz Networks
23.92.16.0/21 8001 Net Access Corporation
23.92.24.0/22 6939 Hurricane Electric
23.92.32.0/20 54098 PCEGGHEADS LLC
23.92.48.0/20 29761 OC3 Networks & Web Solutions,
23.92.64.0/24 54540 Incero LLC

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 /8:16 /9:11 /10:31 /11:93 /12:250
/13:479 /14:910 /15:1614 /16:12782 /17:6704 /18:11135
/19:22794 /20:32451 /21:35022 /22:49394 /23:43106 /24:247174
/25:828 /26:990 /27:467 /28:47 /29:78 /30:18
/31:0 /32:14

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications
36998 1826 1861 MOBITEL
6389 1713 3068 bellsouth.net, inc.
8402 1476 1755 Corbina telecom
22773 1327 2041 Cox Communications, Inc.
30036 1206 1344 Mediacom Communications Corp
11492 1181 1220 Cable One
1785 1085 2013 PaeTec Communications, Inc.
6983 1025 1152 ITC^Deltacom
7011 933 1176 Citizens Utilities

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

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

1:810 2:855 3:3 4:19 5:934 6:19
8:614 12:1894 13:2 14:867 15:11 16:3
17:11 18:19 20:18 23:382 24:1744 27:1565
31:1434 32:45 33:2 34:5 36:71 37:1868
38:899 39:5 40:179 41:3310 42:253 44:9
46:1974 47:4 49:666 50:840 52:12 54:37
55:6 57:26 58:1164 59:621 60:337 61:1417
62:1226 63:1989 64:4559 65:2310 66:4166 67:2058
68:1081 69:3299 70:863 71:497 72:2004 74:2551
75:329 76:304 77:1172 78:1061 79:623 80:1316
81:1026 82:646 83:582 84:581 85:1267 86:500
87:1049 88:556 89:1844 90:158 91:5635 92:606
93:1677 94:2035 95:1596 96:511 97:338 98:1039
99:44 100:31 101:598 103:3299 105:519 106:142
107:208 108:501 109:1871 110:964 111:1131 112:567
113:795 114:735 115:993 116:978 117:818 118:1122
119:1289 120:366 121:740 122:1869 123:1254 124:1389
125:1422 128:617 129:221 130:320 131:651 132:349
133:161 134:287 135:63 136:272 137:268 138:348
139:180 140:181 141:325 142:554 143:384 144:487
145:99 146:537 147:486 148:691 149:356 150:149
151:582 152:416 153:195 154:46 155:480 156:274
157:409 158:285 159:755 160:350 161:458 162:643
163:224 164:626 165:561 166:256 167:599 168:1025
169:125 170:1084 171:194 172:25 173:1600 174:518
175:502 176:1190 177:2181 178:1900 179:117 180:1525
181:696 182:1270 183:433 184:628 185:814 186:2492
187:1458 188:1905 189:1314 190:6937 192:6919 193:5697
194:4631 195:3571 196:1354 197:1011 198:4652 199:5428
200:5982 201:2472 202:8926 203:8919 204:4524 205:2619
206:2835 207:2899 208:3995 209:3620 210:2944 211:1561
212:2271 213:2056 214:926 215:99 216:5285 217:1653
218:622 219:312 220:1277 221:558 222:326 223:499


End of report
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