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.

Tuesday, October 23, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 24 Oct, 2012

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

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

BGP routing table entries examined: 429058
Prefixes after maximum aggregation: 179362
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 210935
Total ASes present in the Internet Routing Table: 42418
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33751
Origin ASes announcing only one prefix: 15811
Transit ASes present in the Internet Routing Table: 5651
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 40
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 848
Unregistered ASNs in the Routing Table: 314
Number of 32-bit ASNs allocated by the RIRs: 3401
Number of 32-bit ASNs visible in the Routing Table: 3016
Prefixes from 32-bit ASNs in the Routing Table: 8143
Special use prefixes present in the Routing Table: 13
Prefixes being announced from unallocated address space: 171
Number of addresses announced to Internet: 2607891820
Equivalent to 155 /8s, 113 /16s and 69 /24s
Percentage of available address space announced: 70.4
Percentage of allocated address space announced: 70.4
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: 150370

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

Prefixes being announced by APNIC Region ASes: 103497
Total APNIC prefixes after maximum aggregation: 32579
APNIC Deaggregation factor: 3.18
Prefixes being announced from the APNIC address blocks: 104251
Unique aggregates announced from the APNIC address blocks: 43034
APNIC Region origin ASes present in the Internet Routing Table: 4786
APNIC Prefixes per ASN: 21.78
APNIC Region origin ASes announcing only one prefix: 1250
APNIC Region transit ASes present in the Internet Routing Table: 779
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: 335
Number of APNIC addresses announced to Internet: 712073888
Equivalent to 42 /8s, 113 /16s and 98 /24s
Percentage of available APNIC address space announced: 83.2

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: 154653
Total ARIN prefixes after maximum aggregation: 78281
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155507
Unique aggregates announced from the ARIN address blocks: 69516
ARIN Region origin ASes present in the Internet Routing Table: 15288
ARIN Prefixes per ASN: 10.17
ARIN Region origin ASes announcing only one prefix: 5779
ARIN Region transit ASes present in the Internet Routing Table: 1594
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1087113088
Equivalent to 64 /8s, 204 /16s and 7 /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: 109126
Total RIPE prefixes after maximum aggregation: 57478
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 111785
Unique aggregates announced from the RIPE address blocks: 71994
RIPE Region origin ASes present in the Internet Routing Table: 16919
RIPE Prefixes per ASN: 6.61
RIPE Region origin ASes announcing only one prefix: 8146
RIPE Region transit ASes present in the Internet Routing Table: 2749
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1967
Number of RIPE addresses announced to Internet: 648090916
Equivalent to 38 /8s, 161 /16s and 21 /24s
Percentage of available RIPE address space announced: 94.2

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: 43900
Total LACNIC prefixes after maximum aggregation: 8724
LACNIC Deaggregation factor: 5.03
Prefixes being announced from the LACNIC address blocks: 47245
Unique aggregates announced from the LACNIC address blocks: 22766
LACNIC Region origin ASes present in the Internet Routing Table: 1669
LACNIC Prefixes per ASN: 28.31
LACNIC Region origin ASes announcing only one prefix: 463
LACNIC Region transit ASes present in the Internet Routing Table: 317
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 692
Number of LACNIC addresses announced to Internet: 118044200
Equivalent to 7 /8s, 9 /16s and 54 /24s
Percentage of available LACNIC address space announced: 70.4

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: 9624
Total AfriNIC prefixes after maximum aggregation: 2245
AfriNIC Deaggregation factor: 4.29
Prefixes being announced from the AfriNIC address blocks: 10099
Unique aggregates announced from the AfriNIC address blocks: 3474
AfriNIC Region origin ASes present in the Internet Routing Table: 568
AfriNIC Prefixes per ASN: 17.78
AfriNIC Region origin ASes announcing only one prefix: 173
AfriNIC Region transit ASes present in the Internet Routing Table: 126
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: 5
Number of AfriNIC addresses announced to Internet: 42264832
Equivalent to 2 /8s, 132 /16s and 233 /24s
Percentage of available AfriNIC address space announced: 42.0

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 2419 830 54 PT TELEKOMUNIKASI INDONESIA
7545 1784 301 87 TPG Internet Pty Ltd
4755 1619 387 163 TATA Communications formerly
9829 1409 1154 41 BSNL National Internet Backbo
9583 1187 88 509 Sify Limited
4808 1113 2056 314 CNCGROUP IP network: China169
7552 1097 1062 16 Vietel Corporation
24560 1035 385 162 Bharti Airtel Ltd., Telemedia
9498 1027 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
6389 3182 3725 166 bellsouth.net, inc.
7029 3135 990 162 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1926 678 126 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
20115 1661 1584 615 Charter Communications
4323 1592 1155 393 Time Warner Telecom
30036 1345 268 752 Mediacom Communications Corp
7018 1274 10289 845 AT&T WorldNet Services
7011 1220 333 690 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 1862 544 16 Corbina telecom
2118 1172 97 14 EUnet/RELCOM Autonomous Syste
12479 851 776 64 Uni2 Autonomous System
34984 822 207 198 BILISIM TELEKOM
31148 726 37 9 FreeNet ISP
6830 723 2313 445 UPC Distribution Services
13188 705 93 139 Educational Network
20940 700 223 546 Akamai Technologies European
58113 601 66 364 LIR DATACENTER TELECOM SRL
8551 595 364 61 Bezeq International

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 2224 378 227 TVCABLE BOGOTA
28573 2146 1277 60 NET Servicos de Comunicao S.A
7303 1662 1131 203 Telecom Argentina Stet-France
8151 1589 3028 355 UniNet S.A. de C.V.
6503 1539 435 69 AVANTEL, S.A.
27947 739 74 96 Telconet S.A
3816 649 309 70 Empresa Nacional de Telecomun
11172 590 85 66 Servicios Alestra S.A de C.V
14420 589 87 102 CORPORACION NACIONAL DE TELEC
7738 586 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 899 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 648 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 287 80 8 RAYA Telecom - Egypt
3741 266 906 224 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 170 681 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 3182 3725 166 bellsouth.net, inc.
7029 3135 990 162 Windstream Communications Inc
4766 2972 11558 900 Korea Telecom (KIX)
17974 2419 830 54 PT TELEKOMUNIKASI INDONESIA
10620 2224 378 227 TVCABLE BOGOTA
28573 2146 1277 60 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1926 678 126 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
8402 1862 544 16 Corbina telecom

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 3135 2973 Windstream Communications Inc
17974 2419 2365 PT TELEKOMUNIKASI INDONESIA
28573 2146 2086 NET Servicos de Comunicao S.A
4766 2972 2072 Korea Telecom (KIX)
10620 2224 1997 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
8402 1862 1846 Corbina telecom
1785 1926 1800 PaeTec Communications, Inc.
22773 1907 1779 Cox Communications, Inc.
7545 1784 1697 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
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
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition
128.0.168.0/21 15772 W-NET Kiev

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 /12:241
/13:478 /14:851 /15:1548 /16:12459 /17:6511 /18:10863
/19:21218 /20:30514 /21:32493 /22:42983 /23:40181 /24:224366
/25:1335 /26:1675 /27:904 /28:176 /29:75 /30:14
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2624 3135 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1790 3182 bellsouth.net, inc.
8402 1561 1862 Corbina telecom
30036 1272 1345 Mediacom Communications Corp
22773 1247 1907 Cox Communications, Inc.
11492 1148 1183 Cable One
6503 1054 1539 AVANTEL, S.A.
1785 1016 1926 PaeTec Communications, Inc.
7011 956 1220 Citizens Utilities

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

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

1:643 2:769 3:1 4:13 5:579 6:3
8:475 12:1977 13:1 14:676 15:11 16:3
17:6 20:27 23:207 24:1788 27:1366 31:1029
32:54 33:2 34:2 36:7 37:865 38:838
39:2 40:136 41:2773 42:158 44:3 46:1637
47:2 49:458 50:607 52:12 54:25 55:7
56:5 57:27 58:991 59:544 60:236 61:1298
62:969 63:1970 64:4274 65:2231 66:4526 67:2121
68:1153 69:3224 70:986 71:506 72:1870 74:2618
75:477 76:310 77:971 78:991 79:504 80:1231
81:974 82:624 83:542 84:526 85:1155 86:486
87:945 88:361 89:1804 90:303 91:5271 92:588
93:1470 94:1647 95:1225 96:366 97:325 98:964
99:39 100:30 101:289 103:1676 105:512 106:121
107:201 108:470 109:1583 110:815 111:972 112:434
113:727 114:631 115:900 116:891 117:764 118:945
119:1223 120:352 121:691 122:1699 123:1163 124:1341
125:1284 128:580 129:195 130:284 131:616 132:307
133:142 134:251 135:62 136:221 137:236 138:337
139:170 140:491 141:285 142:493 143:378 144:499
145:82 146:512 147:268 148:748 149:330 150:158
151:204 152:450 153:183 154:20 155:434 156:227
157:327 158:262 159:659 160:337 161:414 162:365
163:191 164:707 165:445 166:526 167:554 168:976
169:125 170:921 171:152 172:7 173:1687 174:606
175:454 176:747 177:1263 178:1601 180:1348 181:163
182:974 183:314 184:607 185:31 186:2188 187:1333
188:1692 189:1596 190:5923 192:6050 193:5539 194:4599
195:3657 196:1227 197:244 198:3891 199:5072 200:6007
201:1970 202:8702 203:8725 204:4413 205:2522 206:2747
207:2804 208:4043 209:3616 210:2837 211:1534 212:2066
213:1848 214:892 215:86 216:5111 217:1572 218:573
219:307 220:1257 221:532 222:338 223:403

End of report
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