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 1, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 02 Sep, 2013

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

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

BGP routing table entries examined: 465179
Prefixes after maximum aggregation: 187553
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 231053
Total ASes present in the Internet Routing Table: 44842
Prefixes per ASN: 10.37
Origin-only ASes present in the Internet Routing Table: 35040
Origin ASes announcing only one prefix: 16241
Transit ASes present in the Internet Routing Table: 5918
Transit-only ASes present in the Internet Routing Table: 179
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 29
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 5428
Unregistered ASNs in the Routing Table: 1780
Number of 32-bit ASNs allocated by the RIRs: 4995
Number of 32-bit ASNs visible in the Routing Table: 3884
Prefixes from 32-bit ASNs in the Routing Table: 11831
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 355
Number of addresses announced to Internet: 2639075788
Equivalent to 157 /8s, 77 /16s and 25 /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: 94.9
Total number of prefixes smaller than registry allocations: 162853

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

Prefixes being announced by APNIC Region ASes: 110175
Total APNIC prefixes after maximum aggregation: 33449
APNIC Deaggregation factor: 3.29
Prefixes being announced from the APNIC address blocks: 112071
Unique aggregates announced from the APNIC address blocks: 46601
APNIC Region origin ASes present in the Internet Routing Table: 4867
APNIC Prefixes per ASN: 23.03
APNIC Region origin ASes announcing only one prefix: 1219
APNIC Region transit ASes present in the Internet Routing Table: 827
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: 653
Number of APNIC addresses announced to Internet: 727633600
Equivalent to 43 /8s, 94 /16s and 206 /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: 161346
Total ARIN prefixes after maximum aggregation: 80936
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 161826
Unique aggregates announced from the ARIN address blocks: 75303
ARIN Region origin ASes present in the Internet Routing Table: 15843
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 6025
ARIN Region transit ASes present in the Internet Routing Table: 1664
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: 1071021824
Equivalent to 63 /8s, 214 /16s and 127 /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: 119422
Total RIPE prefixes after maximum aggregation: 60946
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123292
Unique aggregates announced from the RIPE address blocks: 79226
RIPE Region origin ASes present in the Internet Routing Table: 17381
RIPE Prefixes per ASN: 7.09
RIPE Region origin ASes announcing only one prefix: 8236
RIPE Region transit ASes present in the Internet Routing Table: 2819
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: 2394
Number of RIPE addresses announced to Internet: 657221604
Equivalent to 39 /8s, 44 /16s and 103 /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: 50735
Total LACNIC prefixes after maximum aggregation: 9634
LACNIC Deaggregation factor: 5.27
Prefixes being announced from the LACNIC address blocks: 55447
Unique aggregates announced from the LACNIC address blocks: 25701
LACNIC Region origin ASes present in the Internet Routing Table: 2000
LACNIC Prefixes per ASN: 27.72
LACNIC Region origin ASes announcing only one prefix: 567
LACNIC Region transit ASes present in the Internet Routing Table: 376
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: 811
Number of LACNIC addresses announced to Internet: 135925032
Equivalent to 8 /8s, 26 /16s and 13 /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: 11581
Total AfriNIC prefixes after maximum aggregation: 2540
AfriNIC Deaggregation factor: 4.56
Prefixes being announced from the AfriNIC address blocks: 12188
Unique aggregates announced from the AfriNIC address blocks: 3893
AfriNIC Region origin ASes present in the Internet Routing Table: 653
AfriNIC Prefixes per ASN: 18.66
AfriNIC Region origin ASes announcing only one prefix: 194
AfriNIC Region transit ASes present in the Internet Routing Table: 137
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: 46533632
Equivalent to 2 /8s, 198 /16s and 12 /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 2917 11561 924 Korea Telecom (KIX)
17974 2667 903 91 PT TELEKOMUNIKASI INDONESIA
7545 2061 320 111 TPG Internet Pty Ltd
4755 1768 391 191 TATA Communications formerly
9829 1535 1221 45 BSNL National Internet Backbo
9583 1227 92 506 Sify Limited
9498 1182 309 70 BHARTI Airtel Ltd.
4808 1155 2128 337 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 2043 2933 125 Cox Communications, Inc.
1785 2006 679 125 PaeTec Communications, Inc.
20115 1674 1645 630 Charter Communications
4323 1615 1103 408 Time Warner Telecom
701 1514 11119 792 UUNET Technologies, Inc.
30036 1349 302 641 Mediacom Communications Corp
7018 1310 11277 828 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 1705 544 16 Corbina telecom
2118 1368 97 13 EUnet/RELCOM Autonomous Syste
34984 1307 244 221 BILISIM TELEKOM
31148 982 43 18 FreeNet ISP
20940 980 351 756 Akamai Technologies European
6830 895 2367 428 UPC Distribution Services
13188 846 99 72 Educational Network
8551 752 370 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 3212 1695 101 NET Servicos de Comunicao S.A
10620 2612 422 239 TVCABLE BOGOTA
7303 1733 1158 223 Telecom Argentina Stet-France
18881 1452 844 20 Global Village Telecom
8151 1286 2774 391 UniNet S.A. de C.V.
11830 933 364 15 Instituto Costarricense de El
27947 839 94 91 Telconet S.A
6503 792 434 63 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 870 274 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 3212 1695 101 NET Servicos de Comunicao S.A
6389 3069 3689 62 bellsouth.net, inc.
4766 2917 11561 924 Korea Telecom (KIX)
17974 2667 903 91 PT TELEKOMUNIKASI INDONESIA
10620 2612 422 239 TVCABLE BOGOTA
18566 2065 382 184 Covad Communications
7545 2061 320 111 TPG Internet Pty Ltd
22773 2043 2933 125 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 3069 3007 bellsouth.net, inc.
17974 2667 2576 PT TELEKOMUNIKASI INDONESIA
10620 2612 2373 TVCABLE BOGOTA
4766 2917 1993 Korea Telecom (KIX)
7545 2061 1950 TPG Internet Pty Ltd
22773 2043 1918 Cox Communications, Inc.
18566 2065 1881 Covad Communications
1785 2006 1881 PaeTec Communications, Inc.
36998 1861 1856 MOBITEL
8402 1705 1689 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.
23.90.192.0/18 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
/13:480 /14:906 /15:1619 /16:12778 /17:6669 /18:11086
/19:22668 /20:32316 /21:34988 /22:49135 /23:42881 /24:246775
/25:865 /26:997 /27:465 /28:44 /29:77 /30:17
/31:0 /32:13

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 1435 1705 Corbina telecom
22773 1329 2043 Cox Communications, Inc.
30036 1212 1349 Mediacom Communications Corp
11492 1181 1220 Cable One
1785 1078 2006 PaeTec Communications, Inc.
6983 1025 1152 ITC^Deltacom
10620 942 2612 TVCABLE BOGOTA

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

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

1:803 2:839 3:3 4:19 5:932 6:19
8:604 12:1896 13:2 14:872 15:11 16:3
17:11 18:19 20:18 23:373 24:1742 27:1553
31:1416 32:45 33:2 34:5 36:73 37:1847
38:900 39:4 40:179 41:3241 42:245 44:9
46:1960 47:4 49:662 50:838 52:12 54:37
55:4 57:26 58:1169 59:617 60:336 61:1415
62:1221 63:1990 64:4570 65:2296 66:4175 67:2076
68:1088 69:3297 70:863 71:496 72:2003 74:2540
75:326 76:304 77:1159 78:1055 79:627 80:1316
81:1023 82:634 83:583 84:578 85:1239 86:479
87:1046 88:539 89:1827 90:158 91:5595 92:635
93:1669 94:2021 95:1551 96:524 97:347 98:1039
99:44 100:29 101:595 103:3229 105:519 106:139
107:209 108:497 109:1869 110:949 111:1114 112:568
113:792 114:712 115:1030 116:973 117:805 118:1126
119:1292 120:367 121:740 122:1867 123:1244 124:1381
125:1419 128:612 129:222 130:311 131:671 132:351
133:160 134:286 135:67 136:266 137:268 138:347
139:179 140:197 141:322 142:552 143:380 144:490
145:100 146:518 147:489 148:679 149:355 150:151
151:565 152:413 153:195 154:30 155:481 156:274
157:406 158:282 159:753 160:350 161:460 162:622
163:222 164:627 165:551 166:255 167:605 168:1029
169:126 170:1081 171:191 172:25 173:1601 174:514
175:495 176:1196 177:2129 178:1917 179:119 180:1522
181:686 182:1245 183:443 184:639 185:795 186:2475
187:1375 188:1913 189:1285 190:7035 192:6933 193:5844
194:4707 195:3590 196:1334 197:1006 198:4648 199:5442
200:5960 201:2592 202:8925 203:8895 204:4520 205:2596
206:2832 207:2903 208:4001 209:3625 210:2939 211:1554
212:2260 213:2052 214:913 215:101 216:5291 217:1651
218:623 219:314 220:1277 221:555 222:325 223:504


End of report
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