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, August 22, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 23 Aug, 2012

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

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

BGP routing table entries examined: 422238
Prefixes after maximum aggregation: 177545
Deaggregation factor: 2.38
Unique aggregates announced to Internet: 206220
Total ASes present in the Internet Routing Table: 41887
Prefixes per ASN: 10.08
Origin-only ASes present in the Internet Routing Table: 33496
Origin ASes announcing only one prefix: 15726
Transit ASes present in the Internet Routing Table: 5614
Transit-only ASes present in the Internet Routing Table: 136
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: 607
Unregistered ASNs in the Routing Table: 211
Number of 32-bit ASNs allocated by the RIRs: 3157
Number of 32-bit ASNs visible in the Routing Table: 2777
Prefixes from 32-bit ASNs in the Routing Table: 7165
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 184
Number of addresses announced to Internet: 2589330444
Equivalent to 154 /8s, 86 /16s and 12 /24s
Percentage of available address space announced: 69.9
Percentage of allocated address space announced: 69.9
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.2
Total number of prefixes smaller than registry allocations: 148905

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

Prefixes being announced by APNIC Region ASes: 101549
Total APNIC prefixes after maximum aggregation: 32749
APNIC Deaggregation factor: 3.10
Prefixes being announced from the APNIC address blocks: 102133
Unique aggregates announced from the APNIC address blocks: 42477
APNIC Region origin ASes present in the Internet Routing Table: 4739
APNIC Prefixes per ASN: 21.55
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 763
Average APNIC Region AS path length visible: 4.5
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 283
Number of APNIC addresses announced to Internet: 707640448
Equivalent to 42 /8s, 45 /16s and 188 /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: 153827
Total ARIN prefixes after maximum aggregation: 77923
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 154826
Unique aggregates announced from the ARIN address blocks: 68882
ARIN Region origin ASes present in the Internet Routing Table: 15224
ARIN Prefixes per ASN: 10.17
ARIN Region origin ASes announcing only one prefix: 5753
ARIN Region transit ASes present in the Internet Routing Table: 1604
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: 1084208256
Equivalent to 64 /8s, 159 /16s and 180 /24s
Percentage of available ARIN address space announced: 57.4

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: 106784
Total RIPE prefixes after maximum aggregation: 56166
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 109030
Unique aggregates announced from the RIPE address blocks: 69139
RIPE Region origin ASes present in the Internet Routing Table: 16788
RIPE Prefixes per ASN: 6.49
RIPE Region origin ASes announcing only one prefix: 8132
RIPE Region transit ASes present in the Internet Routing Table: 2716
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: 1810
Number of RIPE addresses announced to Internet: 640891364
Equivalent to 38 /8s, 51 /16s and 57 /24s
Percentage of available RIPE address space announced: 93.2

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: 43127
Total LACNIC prefixes after maximum aggregation: 8450
LACNIC Deaggregation factor: 5.10
Prefixes being announced from the LACNIC address blocks: 45965
Unique aggregates announced from the LACNIC address blocks: 22122
LACNIC Region origin ASes present in the Internet Routing Table: 1631
LACNIC Prefixes per ASN: 28.18
LACNIC Region origin ASes announcing only one prefix: 427
LACNIC Region transit ASes present in the Internet Routing Table: 313
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: 661
Number of LACNIC addresses announced to Internet: 114582824
Equivalent to 6 /8s, 212 /16s and 101 /24s
Percentage of available LACNIC address space announced: 68.3

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: 9638
Total AfriNIC prefixes after maximum aggregation: 2202
AfriNIC Deaggregation factor: 4.38
Prefixes being announced from the AfriNIC address blocks: 10100
Unique aggregates announced from the AfriNIC address blocks: 3451
AfriNIC Region origin ASes present in the Internet Routing Table: 558
AfriNIC Prefixes per ASN: 18.10
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: 4.6
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: 41680128
Equivalent to 2 /8s, 123 /16s and 253 /24s
Percentage of available AfriNIC address space announced: 41.4

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 2808 11119 1292 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1723 301 87 TPG Internet Pty Ltd
4755 1607 386 158 TATA Communications formerly
9829 1320 1100 27 BSNL National Internet Backbo
9583 1170 86 509 Sify Limited
4808 1128 2053 323 CNCGROUP IP network: China169
7552 1107 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 999 294 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 3450 990 154 Windstream Communications Inc
6389 3366 3772 195 bellsouth.net, inc.
18566 2087 382 180 Covad Communications
1785 1939 680 128 PaeTec Communications, Inc.
22773 1821 2928 125 Cox Communications, Inc.
20115 1647 1573 608 Charter Communications
4323 1572 1026 385 Time Warner Telecom
30036 1403 277 785 Mediacom Communications Corp
7018 1241 10035 810 AT&T WorldNet Services
11492 1196 217 348 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 1591 544 16 Corbina telecom
15557 1216 2247 55 LDCOM NETWORKS
12479 828 764 85 Uni2 Autonomous System
34984 750 189 175 BILISIM TELEKOM
6830 721 2313 448 UPC Distribution Services
31148 712 37 9 FreeNet ISP
20940 699 224 541 Akamai Technologies European
2118 685 97 14 EUnet/RELCOM Autonomous Syste
13188 657 100 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 2093 356 215 TVCABLE BOGOTA
28573 2042 1244 55 NET Servicos de Comunicao S.A
7303 1563 1033 200 Telecom Argentina Stet-France
8151 1476 3032 346 UniNet S.A. de C.V.
6503 1421 435 68 AVANTEL, S.A.
6458 884 81 15 GUATEL
27947 715 74 95 Telconet S.A
3816 602 255 90 Empresa Nacional de Telecomun
11172 591 85 70 Servicios Alestra S.A de C.V
22047 580 326 15 VTR PUNTO NET 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 869 275 36 LINKdotNET AS number
8452 868 958 13 TEDATA
36998 532 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 286 80 8 RAYA Telecom - Egypt
3741 261 904 222 The Internet Solution
12258 194 28 66 Vodacom Internet Company
33776 194 13 11 Starcomms Nigeria Limited
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 3450 990 154 Windstream Communications Inc
6389 3366 3772 195 bellsouth.net, inc.
4766 2808 11119 1292 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2093 356 215 TVCABLE BOGOTA
18566 2087 382 180 Covad Communications
28573 2042 1244 55 NET Servicos de Comunicao S.A
1785 1939 680 128 PaeTec Communications, Inc.
22773 1821 2928 125 Cox Communications, Inc.
7545 1723 301 87 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 3366 3171 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2042 1987 NET Servicos de Comunicao S.A
18566 2087 1907 Covad Communications
10620 2093 1878 TVCABLE BOGOTA
1785 1939 1811 PaeTec Communications, Inc.
22773 1821 1696 Cox Communications, Inc.
7545 1723 1636 TPG Internet Pty Ltd
8402 1591 1575 Corbina telecom
4766 2808 1516 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
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.
59457 UNALLOCATED 5.149.68.0/24 35567 DASTO semtel d.o.o.

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

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

Network Origin AS Description
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
41.207.224.0/23 36898 UniNet Communications

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 /8:19 /9:14 /10:29 /11:84 /12:236
/13:475 /14:840 /15:1534 /16:12350 /17:6393 /18:10799
/19:20928 /20:30036 /21:31738 /22:41940 /23:39709 /24:221179
/25:1272 /26:1511 /27:875 /28:173 /29:62 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2810 3450 Windstream Communications Inc
18566 2037 2087 Covad Communications
6389 1856 3366 bellsouth.net, inc.
30036 1337 1403 Mediacom Communications Corp
8402 1322 1591 Corbina telecom
22773 1172 1821 Cox Communications, Inc.
15557 1160 1216 LDCOM NETWORKS
11492 1159 1196 Cable One
1785 1040 1939 PaeTec Communications, Inc.
6503 977 1421 AVANTEL, S.A.

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

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

1:555 2:795 3:1 4:13 5:370 6:3
8:440 12:2009 13:1 14:647 15:11 16:3
17:6 20:27 23:204 24:1780 27:1339 31:1030
32:56 33:2 34:2 36:8 37:734 38:822
39:1 40:133 41:2857 42:156 44:3 46:1583
47:2 49:435 50:589 52:13 54:16 55:6
56:1 57:31 58:989 59:519 60:238 61:1284
62:990 63:2008 64:4262 65:2246 66:4534 67:2056
68:1156 69:3202 70:989 71:525 72:1864 74:2611
75:491 76:330 77:948 78:907 79:489 80:1276
81:956 82:639 83:534 84:624 85:1136 86:786
87:927 88:347 89:1806 90:301 91:5124 92:591
93:1485 94:1585 95:1267 96:395 97:317 98:900
99:39 100:22 101:260 103:1414 105:512 106:115
107:195 108:431 109:1908 110:792 111:955 112:428
113:684 114:654 115:842 116:885 117:727 118:935
119:1259 120:301 121:694 122:1657 123:1171 124:1358
125:1265 128:523 129:185 130:275 131:627 132:271
133:22 134:244 135:61 136:213 137:239 138:339
139:186 140:502 141:275 142:482 143:357 144:487
145:79 146:510 147:259 148:765 149:300 150:156
151:168 152:458 153:175 154:20 155:410 156:224
157:381 158:179 159:638 160:348 161:409 162:401
163:189 164:689 165:409 166:561 167:540 168:956
169:125 170:907 171:145 172:5 173:1723 174:628
175:441 176:604 177:1033 178:1686 180:1345 181:124
182:1037 183:224 184:584 186:2118 187:1076 188:1466
189:1551 190:6173 192:6009 193:5460 194:4238 195:3267
196:1226 197:205 198:3722 199:4922 200:6005 201:1971
202:8701 203:8663 204:4404 205:2536 206:2815 207:2875
208:4047 209:3641 210:2795 211:1542 212:2010 213:1808
214:885 215:85 216:5133 217:1549 218:546 219:307
220:1240 221:530 222:338 223:376

End of report
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