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.

Sunday, September 8, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 09 Sep, 2013

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

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

BGP routing table entries examined: 466487
Prefixes after maximum aggregation: 188320
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 231894
Total ASes present in the Internet Routing Table: 44907
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35088
Origin ASes announcing only one prefix: 16248
Transit ASes present in the Internet Routing Table: 5914
Transit-only ASes present in the Internet Routing Table: 164
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: 5706
Unregistered ASNs in the Routing Table: 1943
Number of 32-bit ASNs allocated by the RIRs: 5008
Number of 32-bit ASNs visible in the Routing Table: 3905
Prefixes from 32-bit ASNs in the Routing Table: 11999
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 372
Number of addresses announced to Internet: 2641304532
Equivalent to 157 /8s, 111 /16s and 27 /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: 163451

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

Prefixes being announced by APNIC Region ASes: 110443
Total APNIC prefixes after maximum aggregation: 33512
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 112379
Unique aggregates announced from the APNIC address blocks: 46712
APNIC Region origin ASes present in the Internet Routing Table: 4865
APNIC Prefixes per ASN: 23.10
APNIC Region origin ASes announcing only one prefix: 1219
APNIC Region transit ASes present in the Internet Routing Table: 831
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 662
Number of APNIC addresses announced to Internet: 727928512
Equivalent to 43 /8s, 99 /16s and 78 /24s
Percentage of available APNIC address space announced: 85.1

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: 161488
Total ARIN prefixes after maximum aggregation: 81144
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 162084
Unique aggregates announced from the ARIN address blocks: 75458
ARIN Region origin ASes present in the Internet Routing Table: 15866
ARIN Prefixes per ASN: 10.22
ARIN Region origin ASes announcing only one prefix: 6020
ARIN Region transit ASes present in the Internet Routing Table: 1657
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: 1071312896
Equivalent to 63 /8s, 218 /16s and 240 /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: 119734
Total RIPE prefixes after maximum aggregation: 61278
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 123588
Unique aggregates announced from the RIPE address blocks: 79570
RIPE Region origin ASes present in the Internet Routing Table: 17411
RIPE Prefixes per ASN: 7.10
RIPE Region origin ASes announcing only one prefix: 8244
RIPE Region transit ASes present in the Internet Routing Table: 2823
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: 2392
Number of RIPE addresses announced to Internet: 657228772
Equivalent to 39 /8s, 44 /16s and 131 /24s
Percentage of available RIPE address space announced: 95.5

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: 51065
Total LACNIC prefixes after maximum aggregation: 9788
LACNIC Deaggregation factor: 5.22
Prefixes being announced from the LACNIC address blocks: 55784
Unique aggregates announced from the LACNIC address blocks: 25859
LACNIC Region origin ASes present in the Internet Routing Table: 2009
LACNIC Prefixes per ASN: 27.77
LACNIC Region origin ASes announcing only one prefix: 570
LACNIC Region transit ASes present in the Internet Routing Table: 381
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: 825
Number of LACNIC addresses announced to Internet: 137502000
Equivalent to 8 /8s, 50 /16s and 29 /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: 11666
Total AfriNIC prefixes after maximum aggregation: 2547
AfriNIC Deaggregation factor: 4.58
Prefixes being announced from the AfriNIC address blocks: 12280
Unique aggregates announced from the AfriNIC address blocks: 3950
AfriNIC Region origin ASes present in the Internet Routing Table: 650
AfriNIC Prefixes per ASN: 18.89
AfriNIC Region origin ASes announcing only one prefix: 195
AfriNIC Region transit ASes present in the Internet Routing Table: 136
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: 46566400
Equivalent to 2 /8s, 198 /16s and 140 /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 2665 903 90 PT TELEKOMUNIKASI INDONESIA
7545 2068 321 112 TPG Internet Pty Ltd
4755 1770 390 190 TATA Communications formerly
9829 1546 1237 45 BSNL National Internet Backbo
9583 1229 92 508 Sify Limited
9498 1184 309 70 BHARTI Airtel Ltd.
4808 1160 2129 342 CNCGROUP IP network: China169
7552 1139 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 1677 1647 631 Charter Communications
4323 1616 1103 409 Time Warner Telecom
701 1520 11119 796 UUNET Technologies, Inc.
30036 1348 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 1732 544 16 Corbina telecom
34984 1314 244 221 BILISIM TELEKOM
2118 1179 97 13 EUnet/RELCOM Autonomous Syste
20940 991 358 770 Akamai Technologies European
31148 982 43 18 FreeNet ISP
6830 894 2367 426 UPC Distribution Services
13188 847 99 72 Educational Network
8551 749 370 41 Bezeq International
12479 687 797 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 3241 1717 97 NET Servicos de Comunicao S.A
10620 2549 416 259 TVCABLE BOGOTA
7303 1693 1118 223 Telecom Argentina Stet-France
18881 1430 844 20 Global Village Telecom
8151 1286 2775 393 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
6147 733 374 25 Telefonica Del Peru

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 870 274 30 LINKdotNET AS number
6713 543 633 26 Itissalat Al-MAGHRIB
8452 436 956 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 220 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 3241 1717 97 NET Servicos de Comunicao S.A
6389 3068 3689 62 bellsouth.net, inc.
4766 2919 11561 924 Korea Telecom (KIX)
17974 2665 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 2665 2575 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 1732 1716 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 /10:30 /11:93 /12:250
/13:479 /14:910 /15:1614 /16:12781 /17:6696 /18:11127
/19:22801 /20:32388 /21:35009 /22:49406 /23:43122 /24:247311
/25:827 /26:990 /27:467 /28:48 /29:78 /30:19
/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 1453 1732 Corbina telecom
22773 1327 2041 Cox Communications, Inc.
30036 1210 1348 Mediacom Communications Corp
11492 1181 1220 Cable One
1785 1085 2013 PaeTec Communications, Inc.
6983 1025 1152 ITC^Deltacom
7011 932 1175 Citizens Utilities

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

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

1:798 2:855 3:3 4:19 5:937 6:19
8:613 12:1896 13:2 14:869 15:11 16:3
17:11 18:19 20:18 23:376 24:1744 27:1566
31:1435 32:45 33:2 34:5 36:75 37:1871
38:899 39:4 40:179 41:3299 42:254 44:9
46:1971 47:4 49:666 50:840 52:12 54:37
55:9 57:26 58:1170 59:620 60:337 61:1415
62:1227 63:1989 64:4559 65:2313 66:4172 67:2062
68:1091 69:3298 70:863 71:497 72:2004 74:2548
75:329 76:304 77:1159 78:1054 79:620 80:1315
81:1025 82:647 83:582 84:581 85:1261 86:500
87:1049 88:556 89:1843 90:158 91:5627 92:604
93:1675 94:2034 95:1573 96:509 97:342 98:1039
99:44 100:31 101:598 103:3290 105:519 106:142
107:208 108:501 109:1872 110:965 111:1130 112:567
113:774 114:733 115:988 116:975 117:817 118:1125
119:1288 120:366 121:740 122:1871 123:1250 124:1388
125:1422 128:618 129:221 130:319 131:670 132:350
133:161 134:287 135:67 136:272 137:268 138:348
139:180 140:196 141:325 142:554 143:381 144:494
145:100 146:536 147:486 148:681 149:356 150:152
151:582 152:416 153:195 154:30 155:480 156:274
157:408 158:284 159:755 160:350 161:458 162:634
163:226 164:627 165:561 166:256 167:600 168:1033
169:125 170:1082 171:194 172:25 173:1599 174:521
175:502 176:1197 177:2151 178:1900 179:116 180:1525
181:705 182:1266 183:438 184:626 185:815 186:2486
187:1452 188:1905 189:1313 190:7097 192:6917 193:5705
194:4652 195:3567 196:1349 197:1009 198:4651 199:5435
200:6000 201:2527 202:8936 203:8892 204:4522 205:2623
206:2837 207:2901 208:3991 209:3625 210:2943 211:1558
212:2270 213:2057 214:925 215:100 216:5287 217:1651
218:623 219:312 220:1277 221:556 222:326 223:500


End of report
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