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, September 11, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 426357
Prefixes after maximum aggregation: 178318
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 207175
Total ASes present in the Internet Routing Table: 42075
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33587
Origin ASes announcing only one prefix: 15751
Transit ASes present in the Internet Routing Table: 5614
Transit-only ASes present in the Internet Routing Table: 132
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 48687) 24
Prefixes from unregistered ASNs in the Routing Table: 708
Unregistered ASNs in the Routing Table: 248
Number of 32-bit ASNs allocated by the RIRs: 3244
Number of 32-bit ASNs visible in the Routing Table: 2874
Prefixes from 32-bit ASNs in the Routing Table: 7617
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 186
Number of addresses announced to Internet: 2594661836
Equivalent to 154 /8s, 167 /16s and 101 /24s
Percentage of available address space announced: 70.1
Percentage of allocated address space announced: 70.1
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.5
Total number of prefixes smaller than registry allocations: 150238

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

Prefixes being announced by APNIC Region ASes: 102546
Total APNIC prefixes after maximum aggregation: 33045
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 103154
Unique aggregates announced from the APNIC address blocks: 42712
APNIC Region origin ASes present in the Internet Routing Table: 4760
APNIC Prefixes per ASN: 21.67
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 765
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: 301
Number of APNIC addresses announced to Internet: 707910208
Equivalent to 42 /8s, 49 /16s and 218 /24s
Percentage of available APNIC address space announced: 82.7

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: 154337
Total ARIN prefixes after maximum aggregation: 78033
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155314
Unique aggregates announced from the ARIN address blocks: 69095
ARIN Region origin ASes present in the Internet Routing Table: 15228
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5741
ARIN Region transit ASes present in the Internet Routing Table: 1598
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 24
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1083936896
Equivalent to 64 /8s, 155 /16s and 144 /24s
Percentage of available ARIN address space announced: 57.3

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: 108141
Total RIPE prefixes after maximum aggregation: 56558
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 110603
Unique aggregates announced from the RIPE address blocks: 69877
RIPE Region origin ASes present in the Internet Routing Table: 16847
RIPE Prefixes per ASN: 6.57
RIPE Region origin ASes announcing only one prefix: 8162
RIPE Region transit ASes present in the Internet Routing Table: 2723
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1872
Number of RIPE addresses announced to Internet: 644840420
Equivalent to 38 /8s, 111 /16s and 123 /24s
Percentage of available RIPE address space announced: 93.7

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: 43686
Total LACNIC prefixes after maximum aggregation: 8407
LACNIC Deaggregation factor: 5.20
Prefixes being announced from the LACNIC address blocks: 46718
Unique aggregates announced from the LACNIC address blocks: 21887
LACNIC Region origin ASes present in the Internet Routing Table: 1641
LACNIC Prefixes per ASN: 28.47
LACNIC Region origin ASes announcing only one prefix: 437
LACNIC Region transit ASes present in the Internet Routing Table: 320
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 25
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 678
Number of LACNIC addresses announced to Internet: 115850536
Equivalent to 6 /8s, 231 /16s and 189 /24s
Percentage of available LACNIC address space announced: 69.1

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: 9908
Total AfriNIC prefixes after maximum aggregation: 2218
AfriNIC Deaggregation factor: 4.47
Prefixes being announced from the AfriNIC address blocks: 10382
Unique aggregates announced from the AfriNIC address blocks: 3452
AfriNIC Region origin ASes present in the Internet Routing Table: 560
AfriNIC Prefixes per ASN: 18.54
AfriNIC Region origin ASes announcing only one prefix: 171
AfriNIC Region transit ASes present in the Internet Routing Table: 126
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: 41796608
Equivalent to 2 /8s, 125 /16s and 196 /24s
Percentage of available AfriNIC address space announced: 41.5

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 2950 11125 1418 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1753 301 86 TPG Internet Pty Ltd
4755 1617 387 162 TATA Communications formerly
9829 1334 1106 41 BSNL National Internet Backbo
9583 1181 87 510 Sify Limited
7552 1127 1062 11 Vietel Corporation
4808 1121 2049 319 CNCGROUP IP network: China169
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1011 318 75 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 3378 990 160 Windstream Communications Inc
6389 3330 3735 184 bellsouth.net, inc.
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1886 2931 129 Cox Communications, Inc.
20115 1660 1580 615 Charter Communications
4323 1581 1154 387 Time Warner Telecom
30036 1412 278 751 Mediacom Communications Corp
7018 1264 10317 835 AT&T WorldNet Services
11492 1197 217 343 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 1715 544 16 Corbina telecom
2118 1401 97 14 EUnet/RELCOM Autonomous Syste
15557 1223 2247 55 LDCOM NETWORKS
12479 831 766 83 Uni2 Autonomous System
34984 764 205 178 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
31148 713 37 9 FreeNet ISP
20940 709 225 547 Akamai Technologies European
13188 697 100 9 Educational Network
58113 616 69 362 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
10620 2142 365 221 TVCABLE BOGOTA
28573 2123 1248 54 NET Servicos de Comunicao S.A
8151 1572 3034 344 UniNet S.A. de C.V.
7303 1564 1034 199 Telecom Argentina Stet-France
6503 1535 451 69 AVANTEL, S.A.
6458 791 81 15 GUATEL
27947 722 74 94 Telconet S.A
3816 643 310 30 Empresa Nacional de Telecomun
11172 593 85 69 Servicios Alestra S.A de C.V
14420 581 83 100 CORPORACION NACIONAL DE TELEC

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 878 275 36 LINKdotNET AS number
8452 821 958 13 TEDATA
36998 772 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 263 904 223 The Internet Solution
33776 231 13 11 Starcomms Nigeria Limited
12258 194 28 66 Vodacom Internet Company
15706 193 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom

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 3378 990 160 Windstream Communications Inc
6389 3330 3735 184 bellsouth.net, inc.
4766 2950 11125 1418 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2142 365 221 TVCABLE BOGOTA
28573 2123 1248 54 NET Servicos de Comunicao S.A
18566 2085 382 180 Covad Communications
1785 1912 678 127 PaeTec Communications, Inc.
22773 1886 2931 129 Cox Communications, Inc.
7545 1753 301 86 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 3330 3146 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2123 2069 NET Servicos de Comunicao S.A
10620 2142 1921 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1912 1785 PaeTec Communications, Inc.
22773 1886 1757 Cox Communications, Inc.
8402 1715 1699 Corbina telecom
7545 1753 1667 TPG Internet Pty Ltd
4766 2950 1532 Korea Telecom (KIX)

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

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

Bad AS Designation Network Transit AS Description
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 12658 Dexterity Networks L
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.
59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.66.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.67.0/24 35567 DASTO semtel d.o.o.

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

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

Network Origin AS Description
5.226.184.0/21 50478 BVOX AS
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

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 /11:84 /12:237
/13:477 /14:844 /15:1543 /16:12384 /17:6424 /18:10836
/19:21054 /20:30243 /21:32138 /22:42362 /23:39910 /24:223513
/25:1401 /26:1647 /27:922 /28:171 /29:64 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2768 3378 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1851 3330 bellsouth.net, inc.
8402 1437 1715 Corbina telecom
30036 1345 1412 Mediacom Communications Corp
22773 1228 1886 Cox Communications, Inc.
15557 1167 1223 LDCOM NETWORKS
11492 1160 1197 Cable One
6503 1053 1535 AVANTEL, S.A.
1785 1013 1912 PaeTec Communications, Inc.

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

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

1:605 2:791 3:1 4:13 5:441 6:3
8:456 12:2000 13:1 14:664 15:11 16:3
17:6 20:27 23:203 24:1786 27:1333 31:893
32:56 33:2 34:2 36:7 37:753 38:828
39:2 40:133 41:3118 42:158 44:3 46:1557
47:2 49:469 50:593 52:13 54:18 55:8
56:1 57:31 58:987 59:530 60:242 61:1293
62:948 63:2000 64:4265 65:2241 66:4499 67:2044
68:1173 69:3206 70:978 71:523 72:1868 74:2585
75:494 76:323 77:946 78:948 79:487 80:1261
81:957 82:631 83:533 84:625 85:1156 86:811
87:925 88:361 89:1807 90:303 91:5200 92:579
93:1536 94:1604 95:1273 96:416 97:319 98:887
99:39 100:23 101:261 103:1510 105:512 106:119
107:197 108:445 109:1936 110:795 111:966 112:450
113:708 114:658 115:838 116:889 117:734 118:947
119:1267 120:305 121:688 122:1649 123:1171 124:1348
125:1281 128:548 129:184 130:282 131:633 132:310
133:22 134:250 135:61 136:217 137:236 138:342
139:176 140:500 141:280 142:486 143:369 144:493
145:80 146:516 147:285 148:759 149:324 150:157
151:177 152:451 153:183 154:20 155:419 156:222
157:381 158:186 159:646 160:342 161:413 162:403
163:190 164:693 165:417 166:561 167:547 168:961
169:125 170:901 171:149 172:7 173:1714 174:631
175:446 176:576 177:1140 178:1659 180:1353 181:134
182:1051 183:292 184:602 186:2233 187:1211 188:1523
189:1575 190:6105 192:6028 193:5720 194:4560 195:3451
196:1213 197:221 198:3779 199:4982 200:5961 201:1964
202:8714 203:8699 204:4429 205:2549 206:2766 207:2874
208:4057 209:3665 210:2834 211:1540 212:2034 213:1809
214:891 215:87 216:5139 217:1547 218:549 219:316
220:1238 221:532 222:339 223:386

End of report
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