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, August 21, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 22 Aug, 2013

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

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

BGP routing table entries examined: 463453
Prefixes after maximum aggregation: 186951
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 229893
Total ASes present in the Internet Routing Table: 44763
Prefixes per ASN: 10.35
Origin-only ASes present in the Internet Routing Table: 35006
Origin ASes announcing only one prefix: 16214
Transit ASes present in the Internet Routing Table: 5895
Transit-only ASes present in the Internet Routing Table: 171
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 19037) 22
Prefixes from unregistered ASNs in the Routing Table: 4591
Unregistered ASNs in the Routing Table: 1515
Number of 32-bit ASNs allocated by the RIRs: 4966
Number of 32-bit ASNs visible in the Routing Table: 3862
Prefixes from 32-bit ASNs in the Routing Table: 11750
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 311
Number of addresses announced to Internet: 2636187980
Equivalent to 157 /8s, 33 /16s and 9 /24s
Percentage of available address space announced: 71.2
Percentage of allocated address space announced: 71.2
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.9
Total number of prefixes smaller than registry allocations: 162441

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

Prefixes being announced by APNIC Region ASes: 110007
Total APNIC prefixes after maximum aggregation: 33389
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 111841
Unique aggregates announced from the APNIC address blocks: 46409
APNIC Region origin ASes present in the Internet Routing Table: 4870
APNIC Prefixes per ASN: 22.97
APNIC Region origin ASes announcing only one prefix: 1229
APNIC Region transit ASes present in the Internet Routing Table: 826
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 643
Number of APNIC addresses announced to Internet: 726267392
Equivalent to 43 /8s, 73 /16s and 246 /24s
Percentage of available APNIC address space announced: 84.9

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: 160929
Total ARIN prefixes after maximum aggregation: 80797
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 161466
Unique aggregates announced from the ARIN address blocks: 74840
ARIN Region origin ASes present in the Internet Routing Table: 15828
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5996
ARIN Region transit ASes present in the Internet Routing Table: 1671
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: 19
Number of ARIN addresses announced to Internet: 1070547456
Equivalent to 63 /8s, 207 /16s and 66 /24s
Percentage of available ARIN address space announced: 56.6

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, 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: 118562
Total RIPE prefixes after maximum aggregation: 60588
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 122414
Unique aggregates announced from the RIPE address blocks: 78752
RIPE Region origin ASes present in the Internet Routing Table: 17350
RIPE Prefixes per ASN: 7.06
RIPE Region origin ASes announcing only one prefix: 8223
RIPE Region transit ASes present in the Internet Routing Table: 2813
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2387
Number of RIPE addresses announced to Internet: 656959780
Equivalent to 39 /8s, 40 /16s and 105 /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: 50502
Total LACNIC prefixes after maximum aggregation: 9583
LACNIC Deaggregation factor: 5.27
Prefixes being announced from the LACNIC address blocks: 55223
Unique aggregates announced from the LACNIC address blocks: 25668
LACNIC Region origin ASes present in the Internet Routing Table: 2003
LACNIC Prefixes per ASN: 27.57
LACNIC Region origin ASes announcing only one prefix: 571
LACNIC Region transit ASes present in the Internet Routing Table: 365
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: 807
Number of LACNIC addresses announced to Internet: 135437352
Equivalent to 8 /8s, 18 /16s and 156 /24s
Percentage of available LACNIC address space announced: 80.7

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: 11614
Total AfriNIC prefixes after maximum aggregation: 2553
AfriNIC Deaggregation factor: 4.55
Prefixes being announced from the AfriNIC address blocks: 12198
Unique aggregates announced from the AfriNIC address blocks: 3934
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: 195
AfriNIC Region transit ASes present in the Internet Routing Table: 134
Average AfriNIC Region AS path length visible: 4.8
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: 46567168
Equivalent to 2 /8s, 198 /16s and 143 /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 2921 11561 919 Korea Telecom (KIX)
17974 2656 871 92 PT TELEKOMUNIKASI INDONESIA
7545 2060 321 113 TPG Internet Pty Ltd
4755 1762 391 189 TATA Communications formerly
9829 1538 1221 45 BSNL National Internet Backbo
9583 1226 92 505 Sify Limited
9498 1176 309 70 BHARTI Airtel Ltd.
4808 1154 2127 333 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 2936 3673 61 bellsouth.net, inc.
18566 2065 382 184 Covad Communications
22773 2042 2935 128 Cox Communications, Inc.
1785 2006 679 125 PaeTec Communications, Inc.
20115 1676 1646 621 Charter Communications
4323 1620 1105 408 Time Warner Telecom
701 1521 11103 797 UUNET Technologies, Inc.
30036 1340 300 653 Mediacom Communications Corp
7018 1312 11293 829 AT&T WorldNet Services
11492 1223 218 361 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 1624 544 16 Corbina telecom
34984 1304 244 222 BILISIM TELEKOM
20940 983 351 752 Akamai Technologies European
31148 979 43 18 FreeNet ISP
2118 962 97 13 EUnet/RELCOM Autonomous Syste
6830 898 2371 429 UPC Distribution Services
13188 845 99 71 Educational Network
8551 764 370 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 3136 1675 107 NET Servicos de Comunicao S.A
10620 2669 424 223 TVCABLE BOGOTA
7303 1729 1157 221 Telecom Argentina Stet-France
18881 1369 844 20 Global Village Telecom
8151 1284 2768 390 UniNet S.A. de C.V.
11830 945 364 15 Instituto Costarricense de El
27947 837 94 91 Telconet S.A
6503 787 434 63 AVANTEL, S.A.
6147 739 374 25 Telefonica Del Peru
3816 721 302 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 873 274 30 LINKdotNET AS number
6713 543 633 26 Itissalat Al-MAGHRIB
8452 438 956 9 TEDATA
24835 291 80 8 RAYA Telecom - Egypt
3741 258 921 217 The Internet Solution
15706 221 32 6 Sudatel Internet Exchange Aut
29571 220 17 12 Ci Telecom Autonomous system
36992 220 501 29 Etisalat MISR
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 3136 1675 107 NET Servicos de Comunicao S.A
6389 2936 3673 61 bellsouth.net, inc.
4766 2921 11561 919 Korea Telecom (KIX)
10620 2669 424 223 TVCABLE BOGOTA
17974 2656 871 92 PT TELEKOMUNIKASI INDONESIA
18566 2065 382 184 Covad Communications
7545 2060 321 113 TPG Internet Pty Ltd
22773 2042 2935 128 Cox Communications, Inc.
1785 2006 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 2936 2875 bellsouth.net, inc.
17974 2656 2564 PT TELEKOMUNIKASI INDONESIA
10620 2669 2446 TVCABLE BOGOTA
4766 2921 2002 Korea Telecom (KIX)
7545 2060 1947 TPG Internet Pty Ltd
22773 2042 1914 Cox Communications, Inc.
18566 2065 1881 Covad Communications
1785 2006 1881 PaeTec Communications, Inc.
36998 1861 1856 MOBITEL
8402 1624 1608 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
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
30621 UNALLOCATED 12.151.74.0/23 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
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.
23.91.0.0/19 40676 Psychz Networks
23.92.16.0/21 8001 Net Access Corporation
23.92.24.0/22 6939 Hurricane Electric
23.92.64.0/24 54540 Incero LLC
23.92.65.0/24 54540 Incero LLC
23.92.66.0/24 54540 Incero LLC
23.92.67.0/24 54540 Incero LLC
23.92.68.0/24 54540 Incero LLC
23.92.69.0/24 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
/13:480 /14:906 /15:1618 /16:12736 /17:6653 /18:11053
/19:22671 /20:32256 /21:34866 /22:48923 /23:42856 /24:245560
/25:831 /26:1008 /27:480 /28:44 /29:75 /30:18
/31:0 /32:19

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications
36998 1826 1861 MOBITEL
6389 1713 2936 bellsouth.net, inc.
8402 1365 1624 Corbina telecom
22773 1331 2042 Cox Communications, Inc.
30036 1202 1340 Mediacom Communications Corp
11492 1184 1223 Cable One
1785 1079 2006 PaeTec Communications, Inc.
6983 1024 1152 ITC^Deltacom
10620 992 2669 TVCABLE BOGOTA

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

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

1:807 2:744 3:3 4:19 5:914 6:17
8:597 12:1896 13:2 14:869 15:11 16:3
17:10 18:19 20:17 23:337 24:1738 27:1550
31:1408 32:45 33:2 34:5 36:70 37:1826
38:899 39:2 40:180 41:3242 42:243 44:9
46:1956 47:3 49:657 50:840 52:12 54:37
55:7 57:26 58:1173 59:615 60:332 61:1415
62:1178 63:1982 64:4564 65:2155 66:4230 67:2076
68:1095 69:3305 70:864 71:493 72:1986 74:2532
75:325 76:307 77:1144 78:1126 79:617 80:1308
81:1023 82:667 83:586 84:567 85:1220 86:473
87:1051 88:538 89:1823 90:157 91:5580 92:647
93:1659 94:2021 95:1552 96:587 97:347 98:1037
99:44 100:29 101:597 103:3166 105:519 106:138
107:209 108:498 109:1864 110:942 111:1100 112:571
113:801 114:732 115:1028 116:961 117:799 118:1122
119:1289 120:364 121:739 122:1861 123:1246 124:1370
125:1414 128:602 129:222 130:310 131:668 132:349
133:160 134:277 135:67 136:262 137:268 138:344
139:189 140:200 141:321 142:532 143:396 144:497
145:95 146:531 147:481 148:675 149:342 150:152
151:559 152:416 153:194 154:30 155:485 156:273
157:406 158:282 159:741 160:350 161:456 162:599
163:222 164:628 165:555 166:255 167:603 168:1033
169:126 170:989 171:191 172:25 173:1574 174:518
175:493 176:1186 177:2186 178:1905 179:108 180:1523
181:662 182:1214 183:442 184:662 185:763 186:2436
187:1402 188:1889 189:1267 190:7013 192:6929 193:5549
194:4604 195:3608 196:1335 197:1007 198:4605 199:5405
200:5985 201:2606 202:8852 203:8888 204:4522 205:2598
206:2832 207:2898 208:3998 209:3612 210:2913 211:1558
212:2258 213:2050 214:929 215:99 216:5301 217:1656
218:619 219:304 220:1277 221:553 222:324 223:503


End of report
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