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, October 31, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 01 Nov, 2012

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

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

BGP routing table entries examined: 428280
Prefixes after maximum aggregation: 179045
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 211086
Total ASes present in the Internet Routing Table: 42239
Prefixes per ASN: 10.14
Origin-only ASes present in the Internet Routing Table: 33530
Origin ASes announcing only one prefix: 15697
Transit ASes present in the Internet Routing Table: 5663
Transit-only ASes present in the Internet Routing Table: 146
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 42
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 882
Unregistered ASNs in the Routing Table: 324
Number of 32-bit ASNs allocated by the RIRs: 3418
Number of 32-bit ASNs visible in the Routing Table: 3046
Prefixes from 32-bit ASNs in the Routing Table: 8245
Special use prefixes present in the Routing Table: 14
Prefixes being announced from unallocated address space: 160
Number of addresses announced to Internet: 2608959468
Equivalent to 155 /8s, 129 /16s and 143 /24s
Percentage of available address space announced: 70.5
Percentage of allocated address space announced: 70.5
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: 150147

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

Prefixes being announced by APNIC Region ASes: 103876
Total APNIC prefixes after maximum aggregation: 32616
APNIC Deaggregation factor: 3.18
Prefixes being announced from the APNIC address blocks: 104649
Unique aggregates announced from the APNIC address blocks: 42996
APNIC Region origin ASes present in the Internet Routing Table: 4790
APNIC Prefixes per ASN: 21.85
APNIC Region origin ASes announcing only one prefix: 1249
APNIC Region transit ASes present in the Internet Routing Table: 784
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: 342
Number of APNIC addresses announced to Internet: 712552608
Equivalent to 42 /8s, 120 /16s and 176 /24s
Percentage of available APNIC address space announced: 83.3

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: 153685
Total ARIN prefixes after maximum aggregation: 77811
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 154533
Unique aggregates announced from the ARIN address blocks: 69460
ARIN Region origin ASes present in the Internet Routing Table: 15051
ARIN Prefixes per ASN: 10.27
ARIN Region origin ASes announcing only one prefix: 5671
ARIN Region transit ASes present in the Internet Routing Table: 1591
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 42
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1086711168
Equivalent to 64 /8s, 197 /16s and 229 /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: 108549
Total RIPE prefixes after maximum aggregation: 57591
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 111239
Unique aggregates announced from the RIPE address blocks: 72147
RIPE Region origin ASes present in the Internet Routing Table: 16917
RIPE Prefixes per ASN: 6.58
RIPE Region origin ASes announcing only one prefix: 8133
RIPE Region transit ASes present in the Internet Routing Table: 2748
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: 1984
Number of RIPE addresses announced to Internet: 648512420
Equivalent to 38 /8s, 167 /16s and 131 /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: 44198
Total LACNIC prefixes after maximum aggregation: 8741
LACNIC Deaggregation factor: 5.06
Prefixes being announced from the LACNIC address blocks: 47603
Unique aggregates announced from the LACNIC address blocks: 22892
LACNIC Region origin ASes present in the Internet Routing Table: 1691
LACNIC Prefixes per ASN: 28.15
LACNIC Region origin ASes announcing only one prefix: 474
LACNIC Region transit ASes present in the Internet Routing Table: 322
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 697
Number of LACNIC addresses announced to Internet: 118259496
Equivalent to 7 /8s, 12 /16s and 127 /24s
Percentage of available LACNIC address space announced: 70.5

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: 9613
Total AfriNIC prefixes after maximum aggregation: 2233
AfriNIC Deaggregation factor: 4.30
Prefixes being announced from the AfriNIC address blocks: 10096
Unique aggregates announced from the AfriNIC address blocks: 3455
AfriNIC Region origin ASes present in the Internet Routing Table: 566
AfriNIC Prefixes per ASN: 17.84
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 127
Average AfriNIC Region AS path length visible: 4.6
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: 42626816
Equivalent to 2 /8s, 138 /16s and 111 /24s
Percentage of available AfriNIC address space announced: 42.3

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 2972 11558 900 Korea Telecom (KIX)
17974 2431 829 55 PT TELEKOMUNIKASI INDONESIA
7545 1799 301 86 TPG Internet Pty Ltd
4755 1613 376 159 TATA Communications formerly
9829 1399 1152 36 BSNL National Internet Backbo
9583 1190 88 508 Sify Limited
4808 1111 2056 315 CNCGROUP IP network: China169
7552 1107 1062 11 Vietel Corporation
24560 1035 385 162 Bharti Airtel Ltd., Telemedia
9498 1018 310 73 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
6389 3170 3723 161 bellsouth.net, inc.
7029 3123 990 162 Windstream Communications Inc
18566 2084 382 180 Covad Communications
22773 1967 2931 128 Cox Communications, Inc.
1785 1832 678 126 PaeTec Communications, Inc.
20115 1664 1585 626 Charter Communications
4323 1591 1153 392 Time Warner Telecom
30036 1359 273 754 Mediacom Communications Corp
7018 1253 10289 842 AT&T WorldNet Services
7011 1205 331 703 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 1887 544 16 Corbina telecom
12479 851 776 64 Uni2 Autonomous System
34984 822 207 198 BILISIM TELEKOM
31148 726 37 9 FreeNet ISP
6830 722 2314 444 UPC Distribution Services
13188 708 93 136 Educational Network
20940 699 223 548 Akamai Technologies European
58113 601 66 364 LIR DATACENTER TELECOM SRL
8551 594 364 61 Bezeq International
3320 497 8440 407 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 2233 380 225 TVCABLE BOGOTA
28573 2151 1278 61 NET Servicos de Comunicao S.A
7303 1661 1131 201 Telecom Argentina Stet-France
8151 1592 3032 355 UniNet S.A. de C.V.
6503 1540 435 68 AVANTEL, S.A.
27947 744 77 91 Telconet S.A
3816 656 309 69 Empresa Nacional de Telecomun
14420 594 90 103 CORPORACION NACIONAL DE TELEC
11172 589 85 65 Servicios Alestra S.A de C.V
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 896 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 569 958 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 172 697 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
6389 3170 3723 161 bellsouth.net, inc.
7029 3123 990 162 Windstream Communications Inc
4766 2972 11558 900 Korea Telecom (KIX)
17974 2431 829 55 PT TELEKOMUNIKASI INDONESIA
10620 2233 380 225 TVCABLE BOGOTA
28573 2151 1278 61 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
22773 1967 2931 128 Cox Communications, Inc.
8402 1887 544 16 Corbina telecom
1785 1832 678 126 PaeTec Communications, Inc.

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
7029 3123 2961 Windstream Communications Inc
17974 2431 2376 PT TELEKOMUNIKASI INDONESIA
28573 2151 2090 NET Servicos de Comunicao S.A
4766 2972 2072 Korea Telecom (KIX)
10620 2233 2008 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
8402 1887 1871 Corbina telecom
22773 1967 1839 Cox Communications, Inc.
7545 1799 1713 TPG Internet Pty Ltd
1785 1832 1706 PaeTec Communications, Inc.

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
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
59457 UNALLOCATED 5.149.64.0/24 35567 DASTO semtel d.o.o.

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 25379 Prof-Tel-Comm Ltd.
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 /9:14 /10:29 /11:87 /12:243
/13:478 /14:849 /15:1545 /16:12446 /17:6526 /18:10871
/19:21204 /20:30590 /21:32549 /22:42973 /23:40212 /24:223398
/25:1349 /26:1694 /27:907 /28:180 /29:76 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2614 3123 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1786 3170 bellsouth.net, inc.
8402 1589 1887 Corbina telecom
22773 1300 1967 Cox Communications, Inc.
30036 1278 1359 Mediacom Communications Corp
11492 1152 1187 Cable One
6503 1054 1540 AVANTEL, S.A.
1785 943 1832 PaeTec Communications, Inc.
7011 943 1205 Citizens Utilities

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

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

1:647 2:789 3:1 4:13 5:582 6:3
8:471 12:1932 13:3 14:687 15:11 16:3
17:6 20:27 23:210 24:1796 27:1335 31:1026
32:54 33:2 34:2 36:7 37:924 38:794
39:2 40:137 41:2720 42:175 44:3 46:1623
47:2 49:474 50:603 52:12 54:27 55:6
56:4 57:27 58:987 59:550 60:237 61:1292
62:951 63:1952 64:4214 65:2154 66:4467 67:2093
68:1158 69:3204 70:945 71:503 72:1869 74:2594
75:477 76:266 77:976 78:1000 79:509 80:1229
81:982 82:609 83:541 84:528 85:1150 86:491
87:943 88:358 89:1788 90:304 91:5287 92:581
93:1452 94:1676 95:1303 96:409 97:324 98:961
99:39 100:30 101:294 103:1731 105:512 106:102
107:201 108:473 109:1608 110:828 111:959 112:437
113:735 114:667 115:872 116:887 117:762 118:954
119:1224 120:360 121:694 122:1694 123:1160 124:1344
125:1288 128:548 129:197 130:280 131:645 132:309
133:142 134:251 135:61 136:214 137:238 138:335
139:170 140:491 141:290 142:493 143:377 144:489
145:82 146:518 147:274 148:728 149:328 150:156
151:204 152:450 153:183 154:21 155:418 156:227
157:366 158:286 159:666 160:333 161:414 162:364
163:191 164:711 165:446 166:513 167:555 168:999
169:129 170:911 171:153 172:6 173:1692 174:635
175:457 176:782 177:1366 178:1633 180:1365 181:162
182:1104 183:313 184:611 185:49 186:2201 187:1366
188:1727 189:1596 190:5907 192:6027 193:5397 194:4083
195:3449 196:1230 197:249 198:3865 199:5052 200:6010
201:1966 202:8708 203:8715 204:4373 205:2517 206:2708
207:2777 208:3991 209:3560 210:2831 211:1533 212:2087
213:1834 214:876 215:75 216:5062 217:1574 218:575
219:308 220:1260 221:531 222:337 223:401

End of report
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