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, November 11, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 12 Nov, 2012

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

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

BGP routing table entries examined: 430577
Prefixes after maximum aggregation: 179648
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 211977
Total ASes present in the Internet Routing Table: 42561
Prefixes per ASN: 10.12
Origin-only ASes present in the Internet Routing Table: 33799
Origin ASes announcing only one prefix: 15828
Transit ASes present in the Internet Routing Table: 5671
Transit-only ASes present in the Internet Routing Table: 141
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 41
Max AS path prepend of ASN ( 22394) 37
Prefixes from unregistered ASNs in the Routing Table: 1032
Unregistered ASNs in the Routing Table: 366
Number of 32-bit ASNs allocated by the RIRs: 3468
Number of 32-bit ASNs visible in the Routing Table: 3091
Prefixes from 32-bit ASNs in the Routing Table: 8424
Special use prefixes present in the Routing Table: 14
Prefixes being announced from unallocated address space: 158
Number of addresses announced to Internet: 2612635244
Equivalent to 155 /8s, 185 /16s and 166 /24s
Percentage of available address space announced: 70.6
Percentage of allocated address space announced: 70.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.8
Total number of prefixes smaller than registry allocations: 151242

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

Prefixes being announced by APNIC Region ASes: 104422
Total APNIC prefixes after maximum aggregation: 32557
APNIC Deaggregation factor: 3.21
Prefixes being announced from the APNIC address blocks: 105250
Unique aggregates announced from the APNIC address blocks: 43024
APNIC Region origin ASes present in the Internet Routing Table: 4790
APNIC Prefixes per ASN: 21.97
APNIC Region origin ASes announcing only one prefix: 1248
APNIC Region transit ASes present in the Internet Routing Table: 781
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 356
Number of APNIC addresses announced to Internet: 714136480
Equivalent to 42 /8s, 144 /16s and 219 /24s
Percentage of available APNIC address space announced: 83.5

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: 154998
Total ARIN prefixes after maximum aggregation: 78292
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155815
Unique aggregates announced from the ARIN address blocks: 69878
ARIN Region origin ASes present in the Internet Routing Table: 15282
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5767
ARIN Region transit ASes present in the Internet Routing Table: 1590
Average ARIN Region AS path length visible: 4.2
Max ARIN Region AS path length visible: 41
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1087280000
Equivalent to 64 /8s, 206 /16s and 147 /24s
Percentage of available ARIN address space announced: 57.5

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, 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: 108888
Total RIPE prefixes after maximum aggregation: 57790
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 111652
Unique aggregates announced from the RIPE address blocks: 72598
RIPE Region origin ASes present in the Internet Routing Table: 16960
RIPE Prefixes per ASN: 6.58
RIPE Region origin ASes announcing only one prefix: 8159
RIPE Region transit ASes present in the Internet Routing Table: 2751
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2001
Number of RIPE addresses announced to Internet: 648620324
Equivalent to 38 /8s, 169 /16s and 41 /24s
Percentage of available RIPE address space announced: 94.3

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: 44246
Total LACNIC prefixes after maximum aggregation: 8751
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 47711
Unique aggregates announced from the LACNIC address blocks: 22797
LACNIC Region origin ASes present in the Internet Routing Table: 1702
LACNIC Prefixes per ASN: 28.03
LACNIC Region origin ASes announcing only one prefix: 482
LACNIC Region transit ASes present in the Internet Routing Table: 327
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 711
Number of LACNIC addresses announced to Internet: 119322408
Equivalent to 7 /8s, 28 /16s and 183 /24s
Percentage of available LACNIC address space announced: 71.1

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
262144-263167 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: 9481
Total AfriNIC prefixes after maximum aggregation: 2205
AfriNIC Deaggregation factor: 4.30
Prefixes being announced from the AfriNIC address blocks: 9991
Unique aggregates announced from the AfriNIC address blocks: 3546
AfriNIC Region origin ASes present in the Internet Routing Table: 563
AfriNIC Prefixes per ASN: 17.75
AfriNIC Region origin ASes announcing only one prefix: 172
AfriNIC Region transit ASes present in the Internet Routing Table: 124
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 25
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 42969856
Equivalent to 2 /8s, 143 /16s and 171 /24s
Percentage of available AfriNIC address space announced: 42.7

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 2957 11557 898 Korea Telecom (KIX)
17974 2421 826 46 PT TELEKOMUNIKASI INDONESIA
7545 1802 301 88 TPG Internet Pty Ltd
4755 1613 375 159 TATA Communications formerly
9829 1412 1155 42 BSNL National Internet Backbo
9583 1189 88 507 Sify Limited
7552 1131 1062 11 Vietel Corporation
4808 1111 2056 315 CNCGROUP IP network: China169
24560 1039 385 165 Bharti Airtel Ltd., Telemedia
9498 1020 310 74 BHARTI Airtel Ltd.

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
7029 3205 991 190 Windstream Communications Inc
6389 3166 3722 159 bellsouth.net, inc.
18566 2084 382 180 Covad Communications
22773 1970 2931 128 Cox Communications, Inc.
1785 1933 678 128 PaeTec Communications, Inc.
20115 1670 1603 626 Charter Communications
4323 1588 1153 392 Time Warner Telecom
30036 1375 283 746 Mediacom Communications Corp
7018 1267 10275 844 AT&T WorldNet Services
7011 1222 334 692 Citizens Utilities

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 1757 544 16 Corbina telecom
12479 853 777 63 Uni2 Autonomous System
34984 833 208 203 BILISIM TELEKOM
31148 729 37 9 FreeNet ISP
13188 724 93 139 Educational Network
6830 712 2313 435 UPC Distribution Services
20940 711 228 548 Akamai Technologies European
58113 602 67 365 LIR DATACENTER TELECOM SRL
8551 594 364 61 Bezeq International
3320 494 8438 405 Deutsche Telekom AG

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
10620 2251 384 208 TVCABLE BOGOTA
28573 2156 1283 64 NET Servicos de Comunicao S.A
7303 1669 1139 202 Telecom Argentina Stet-France
8151 1602 3052 352 UniNet S.A. de C.V.
6503 1539 435 67 AVANTEL, S.A.
27947 748 77 92 Telconet S.A
3816 615 307 90 Empresa Nacional de Telecomun
11172 588 85 65 Servicios Alestra S.A de C.V
18881 584 716 18 Global Village Telecom
7738 582 1178 33 Telecomunicacoes da Bahia S.A

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
24863 903 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 543 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 287 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 181 697 88 MTN Network Solutions

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
7029 3205 991 190 Windstream Communications Inc
6389 3166 3722 159 bellsouth.net, inc.
4766 2957 11557 898 Korea Telecom (KIX)
17974 2421 826 46 PT TELEKOMUNIKASI INDONESIA
10620 2251 384 208 TVCABLE BOGOTA
28573 2156 1283 64 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
22773 1970 2931 128 Cox Communications, Inc.
1785 1933 678 128 PaeTec Communications, Inc.
7545 1802 301 88 TPG Internet Pty Ltd

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 3166 3007 bellsouth.net, inc.
17974 2421 2375 PT TELEKOMUNIKASI INDONESIA
28573 2156 2092 NET Servicos de Comunicao S.A
4766 2957 2059 Korea Telecom (KIX)
10620 2251 2043 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
22773 1970 1842 Cox Communications, Inc.
1785 1933 1805 PaeTec Communications, Inc.
8402 1757 1741 Corbina telecom
7545 1802 1714 TPG Internet Pty Ltd

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
59505 UNALLOCATED 5.2.65.0/24 50673 Serverius AS
59505 UNALLOCATED 5.2.66.0/24 50673 Serverius AS
59530 UNALLOCATED 5.8.182.0/24 31261 GARS Telecom
61408 UNALLOCATED 5.56.0.0/21 174 Cogent Communication
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 3549 Global Crossing
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59521 UNALLOCATED 5.134.192.0/21 29518 Labs2
59441 UNALLOCATED 5.144.128.0/21 50810 Mobin Net Communicat
59581 UNALLOCATED 5.149.8.0/21 25577 C4L main AS

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

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

Prefix Origin AS Description
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition

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

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

Network Origin AS Description
14.192.0.0/22 45464 Room 201, TGU Bldg
14.192.4.0/22 45464 Room 201, TGU Bldg
14.192.8.0/22 45464 Room 201, TGU Bldg
14.192.12.0/22 45464 Room 201, TGU Bldg
14.192.16.0/22 45464 Room 201, TGU Bldg
14.192.20.0/22 45464 Room 201, TGU Bldg
14.192.24.0/22 45464 Room 201, TGU Bldg
14.192.28.0/22 45464 Room 201, TGU Bldg
27.112.114.0/24 23884 Proimage Engineering and Comm
41.220.80.0/24 38925 DAC AS Germany

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 /8:18 /9:13 /10:29 /11:88 /12:243
/13:480 /14:851 /15:1550 /16:12428 /17:6535 /18:10890
/19:21309 /20:30701 /21:32749 /22:43282 /23:40431 /24:224728
/25:1354 /26:1699 /27:902 /28:179 /29:77 /30:17
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2645 3205 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1785 3166 bellsouth.net, inc.
8402 1467 1757 Corbina telecom
22773 1298 1970 Cox Communications, Inc.
30036 1291 1375 Mediacom Communications Corp
11492 1149 1184 Cable One
6503 1054 1539 AVANTEL, S.A.
1785 1018 1933 PaeTec Communications, Inc.
7011 957 1222 Citizens Utilities

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

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

1:645 2:774 3:1 4:13 5:651 6:3
8:481 12:1955 13:3 14:689 15:11 16:3
17:6 20:27 23:211 24:1810 27:1398 31:1032
32:54 33:2 34:2 36:7 37:934 38:838
39:2 40:138 41:2648 42:177 44:3 46:1652
47:2 49:505 50:609 52:12 54:27 55:4
56:1 57:27 58:1058 59:542 60:237 61:1297
62:947 63:2019 64:4301 65:2202 66:4520 67:2102
68:1159 69:3218 70:937 71:554 72:1886 74:2615
75:478 76:285 77:993 78:1004 79:512 80:1242
81:980 82:624 83:543 84:520 85:1151 86:511
87:941 88:350 89:1747 90:305 91:5308 92:580
93:1407 94:1723 95:1280 96:411 97:325 98:973
99:39 100:31 101:291 103:1771 105:519 106:121
107:202 108:478 109:1631 110:832 111:979 112:435
113:738 114:675 115:895 116:885 117:759 118:970
119:1227 120:362 121:693 122:1699 123:1153 124:1331
125:1287 128:556 129:200 130:291 131:660 132:315
133:142 134:254 135:62 136:215 137:238 138:339
139:175 140:489 141:291 142:497 143:331 144:480
145:83 146:526 147:260 148:736 149:328 150:158
151:209 152:451 153:183 154:21 155:430 156:228
157:367 158:285 159:669 160:336 161:414 162:369
163:191 164:581 165:446 166:454 167:562 168:972
169:130 170:922 171:157 172:7 173:1700 174:630
175:470 176:725 177:1417 178:1638 180:1384 181:168
182:1105 183:302 184:609 185:54 186:2068 187:1378
188:1747 189:1626 190:5869 192:6053 193:5407 194:4133
195:3462 196:1180 197:260 198:3909 199:5094 200:6006
201:1975 202:8728 203:8710 204:4430 205:2539 206:2759
207:2807 208:4064 209:3623 210:2886 211:1531 212:2142
213:1846 214:882 215:74 216:5186 217:1576 218:577
219:312 220:1260 221:527 222:337 223:406

End of report
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