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, September 4, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 05 Sep, 2013

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

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

BGP routing table entries examined: 466017
Prefixes after maximum aggregation: 187998
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 231552
Total ASes present in the Internet Routing Table: 44887
Prefixes per ASN: 10.38
Origin-only ASes present in the Internet Routing Table: 35066
Origin ASes announcing only one prefix: 16257
Transit ASes present in the Internet Routing Table: 5925
Transit-only ASes present in the Internet Routing Table: 173
Average AS path length visible in the Internet Routing Table: 4.7
Max AS path length visible: 29
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 5608
Unregistered ASNs in the Routing Table: 1872
Number of 32-bit ASNs allocated by the RIRs: 4999
Number of 32-bit ASNs visible in the Routing Table: 3896
Prefixes from 32-bit ASNs in the Routing Table: 11942
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 368
Number of addresses announced to Internet: 2639396308
Equivalent to 157 /8s, 81 /16s and 253 /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: 163184

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

Prefixes being announced by APNIC Region ASes: 110340
Total APNIC prefixes after maximum aggregation: 33495
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 112245
Unique aggregates announced from the APNIC address blocks: 46745
APNIC Region origin ASes present in the Internet Routing Table: 4868
APNIC Prefixes per ASN: 23.06
APNIC Region origin ASes announcing only one prefix: 1223
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: 24
Number of APNIC region 32-bit ASNs visible in the Routing Table: 657
Number of APNIC addresses announced to Internet: 727865792
Equivalent to 43 /8s, 98 /16s and 89 /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: 161480
Total ARIN prefixes after maximum aggregation: 81049
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 162044
Unique aggregates announced from the ARIN address blocks: 75442
ARIN Region origin ASes present in the Internet Routing Table: 15858
ARIN Prefixes per ASN: 10.22
ARIN Region origin ASes announcing only one prefix: 6025
ARIN Region transit ASes present in the Internet Routing Table: 1665
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: 1071045120
Equivalent to 63 /8s, 214 /16s and 218 /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: 119634
Total RIPE prefixes after maximum aggregation: 61152
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123521
Unique aggregates announced from the RIPE address blocks: 79378
RIPE Region origin ASes present in the Internet Routing Table: 17393
RIPE Prefixes per ASN: 7.10
RIPE Region origin ASes announcing only one prefix: 8241
RIPE Region transit ASes present in the Internet Routing Table: 2825
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2394
Number of RIPE addresses announced to Internet: 657277924
Equivalent to 39 /8s, 45 /16s and 67 /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: 50938
Total LACNIC prefixes after maximum aggregation: 9717
LACNIC Deaggregation factor: 5.24
Prefixes being announced from the LACNIC address blocks: 55637
Unique aggregates announced from the LACNIC address blocks: 25758
LACNIC Region origin ASes present in the Internet Routing Table: 2012
LACNIC Prefixes per ASN: 27.65
LACNIC Region origin ASes announcing only one prefix: 572
LACNIC Region transit ASes present in the Internet Routing Table: 380
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: 819
Number of LACNIC addresses announced to Internet: 135927600
Equivalent to 8 /8s, 26 /16s and 23 /24s
Percentage of available LACNIC address space announced: 81.0

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: 11592
Total AfriNIC prefixes after maximum aggregation: 2535
AfriNIC Deaggregation factor: 4.57
Prefixes being announced from the AfriNIC address blocks: 12202
Unique aggregates announced from the AfriNIC address blocks: 3888
AfriNIC Region origin ASes present in the Internet Routing Table: 651
AfriNIC Prefixes per ASN: 18.74
AfriNIC Region origin ASes announcing only one prefix: 196
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: 46525696
Equivalent to 2 /8s, 197 /16s and 237 /24s
Percentage of available AfriNIC address space announced: 46.2

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 2919 11561 924 Korea Telecom (KIX)
17974 2672 903 91 PT TELEKOMUNIKASI INDONESIA
7545 2063 320 113 TPG Internet Pty Ltd
4755 1768 390 190 TATA Communications formerly
9829 1547 1237 46 BSNL National Internet Backbo
9583 1227 92 506 Sify Limited
9498 1182 309 70 BHARTI Airtel Ltd.
4808 1159 2129 341 CNCGROUP IP network: China169
7552 1139 1080 13 Vietel Corporation
24560 1089 394 160 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 3069 3689 62 bellsouth.net, inc.
18566 2065 382 184 Covad Communications
22773 2042 2933 125 Cox Communications, Inc.
1785 2008 679 125 PaeTec Communications, Inc.
20115 1673 1645 630 Charter Communications
4323 1617 1103 409 Time Warner Telecom
701 1521 11119 797 UUNET Technologies, Inc.
30036 1349 302 641 Mediacom Communications Corp
7018 1315 11277 829 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 1737 544 16 Corbina telecom
34984 1312 244 221 BILISIM TELEKOM
2118 1178 97 13 EUnet/RELCOM Autonomous Syste
31148 982 43 18 FreeNet ISP
20940 981 351 759 Akamai Technologies European
6830 894 2367 427 UPC Distribution Services
13188 846 99 72 Educational Network
8551 753 370 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 3220 1707 96 NET Servicos de Comunicao S.A
10620 2527 414 268 TVCABLE BOGOTA
7303 1733 1158 223 Telecom Argentina Stet-France
18881 1424 844 20 Global Village Telecom
8151 1285 2772 391 UniNet S.A. de C.V.
11830 933 364 15 Instituto Costarricense de El
27947 838 94 91 Telconet S.A
6503 811 434 64 AVANTEL, S.A.
6147 734 374 25 Telefonica Del Peru
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 869 274 30 LINKdotNET AS number
6713 543 633 26 Itissalat Al-MAGHRIB
8452 435 956 9 TEDATA
24835 291 80 8 RAYA Telecom - Egypt
3741 258 921 217 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 3220 1707 96 NET Servicos de Comunicao S.A
6389 3069 3689 62 bellsouth.net, inc.
4766 2919 11561 924 Korea Telecom (KIX)
17974 2672 903 91 PT TELEKOMUNIKASI INDONESIA
10620 2527 414 268 TVCABLE BOGOTA
18566 2065 382 184 Covad Communications
7545 2063 320 113 TPG Internet Pty Ltd
22773 2042 2933 125 Cox Communications, Inc.
1785 2008 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 3069 3007 bellsouth.net, inc.
17974 2672 2581 PT TELEKOMUNIKASI INDONESIA
10620 2527 2259 TVCABLE BOGOTA
4766 2919 1995 Korea Telecom (KIX)
7545 2063 1950 TPG Internet Pty Ltd
22773 2042 1917 Cox Communications, Inc.
1785 2008 1883 PaeTec Communications, Inc.
18566 2065 1881 Covad Communications
36998 1861 1856 MOBITEL
8402 1737 1721 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.
23.92.16.0/21 8001 Net Access Corporation
23.92.24.0/22 6939 Hurricane Electric
23.92.48.0/20 29761 OC3 Networks & Web Solutions,
23.92.64.0/24 54540 Incero LLC
23.92.65.0/24 54540 Incero LLC
23.92.66.0/24 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 /14:905 /15:1614 /16:12779 /17:6687 /18:11111
/19:22693 /20:32413 /21:35037 /22:49267 /23:43008 /24:247185
/25:824 /26:993 /27:466 /28:46 /29:77 /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 1714 3069 bellsouth.net, inc.
8402 1463 1737 Corbina telecom
22773 1328 2042 Cox Communications, Inc.
30036 1212 1349 Mediacom Communications Corp
11492 1181 1220 Cable One
1785 1080 2008 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)
----------------------------------------------

1:809 2:846 3:3 4:19 5:939 6:19
8:606 9:7 12:1895 13:2 14:871 15:11
16:3 17:11 18:19 20:18 23:374 24:1744
27:1559 31:1429 32:45 33:2 34:5 36:75
37:1864 38:898 39:4 40:179 41:3250 42:254
44:9 46:1967 47:4 49:665 50:840 52:12
54:37 55:6 57:26 58:1169 59:618 60:336
61:1414 62:1225 63:1992 64:4555 65:2296 66:4164
67:2063 68:1085 69:3297 70:863 71:496 72:2008
74:2542 75:329 76:304 77:1165 78:1057 79:626
80:1316 81:1022 82:646 83:581 84:580 85:1256
86:482 87:1046 88:557 89:1838 90:158 91:5621
92:635 93:1668 94:2024 95:1582 96:524 97:347
98:1040 99:44 100:29 101:597 103:3270 105:519
106:141 107:208 108:497 109:1876 110:963 111:1118
112:565 113:791 114:714 115:990 116:977 117:814
118:1124 119:1296 120:367 121:740 122:1869 123:1251
124:1388 125:1420 128:611 129:223 130:318 131:658
132:351 133:161 134:287 135:67 136:271 137:268
138:347 139:178 140:192 141:325 142:554 143:388
144:489 145:100 146:531 147:492 148:686 149:355
150:153 151:581 152:416 153:195 154:30 155:480
156:274 157:409 158:282 159:753 160:350 161:458
162:626 163:224 164:627 165:561 166:256 167:605
168:1031 169:126 170:1076 171:192 172:25 173:1603
174:518 175:499 176:1196 177:2155 178:1909 179:115
180:1531 181:711 182:1259 183:438 184:635 185:806
186:2484 187:1432 188:1894 189:1294 190:7038 192:6958
193:5707 194:4652 195:3584 196:1340 197:1006 198:4656
199:5446 200:6014 201:2597 202:8921 203:8908 204:4520
205:2621 206:2839 207:2904 208:3999 209:3622 210:2944
211:1552 212:2266 213:2052 214:917 215:100 216:5288
217:1651 218:623 219:313 220:1277 221:557 222:325
223:506

End of report
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