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.

Monday, September 17, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 18 Sep, 2012

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

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

BGP routing table entries examined: 427079
Prefixes after maximum aggregation: 177999
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 207531
Total ASes present in the Internet Routing Table: 42099
Prefixes per ASN: 10.14
Origin-only ASes present in the Internet Routing Table: 33606
Origin ASes announcing only one prefix: 15760
Transit ASes present in the Internet Routing Table: 5605
Transit-only ASes present in the Internet Routing Table: 140
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: 719
Unregistered ASNs in the Routing Table: 251
Number of 32-bit ASNs allocated by the RIRs: 3290
Number of 32-bit ASNs visible in the Routing Table: 2888
Prefixes from 32-bit ASNs in the Routing Table: 7652
Special use prefixes present in the Routing Table: 3
Prefixes being announced from unallocated address space: 164
Number of addresses announced to Internet: 2595929548
Equivalent to 154 /8s, 186 /16s and 189 /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: 93.6
Total number of prefixes smaller than registry allocations: 150689

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

Prefixes being announced by APNIC Region ASes: 102665
Total APNIC prefixes after maximum aggregation: 32490
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103291
Unique aggregates announced from the APNIC address blocks: 42725
APNIC Region origin ASes present in the Internet Routing Table: 4762
APNIC Prefixes per ASN: 21.69
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 766
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: 310
Number of APNIC addresses announced to Internet: 707879744
Equivalent to 42 /8s, 49 /16s and 99 /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: 154312
Total ARIN prefixes after maximum aggregation: 78061
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155301
Unique aggregates announced from the ARIN address blocks: 69080
ARIN Region origin ASes present in the Internet Routing Table: 15239
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5757
ARIN Region transit ASes present in the Internet Routing Table: 1596
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: 1084125568
Equivalent to 64 /8s, 158 /16s and 113 /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: 108687
Total RIPE prefixes after maximum aggregation: 56715
RIPE Deaggregation factor: 1.92
Prefixes being announced from the RIPE address blocks: 111165
Unique aggregates announced from the RIPE address blocks: 70165
RIPE Region origin ASes present in the Internet Routing Table: 16829
RIPE Prefixes per ASN: 6.61
RIPE Region origin ASes announcing only one prefix: 8149
RIPE Region transit ASes present in the Internet Routing Table: 2709
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: 1880
Number of RIPE addresses announced to Internet: 645548772
Equivalent to 38 /8s, 122 /16s and 74 /24s
Percentage of available RIPE address space announced: 93.8

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: 43796
Total LACNIC prefixes after maximum aggregation: 8454
LACNIC Deaggregation factor: 5.18
Prefixes being announced from the LACNIC address blocks: 46831
Unique aggregates announced from the LACNIC address blocks: 21953
LACNIC Region origin ASes present in the Internet Routing Table: 1646
LACNIC Prefixes per ASN: 28.45
LACNIC Region origin ASes announcing only one prefix: 442
LACNIC Region transit ASes present in the Internet Routing Table: 321
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 28
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 675
Number of LACNIC addresses announced to Internet: 116273448
Equivalent to 6 /8s, 238 /16s and 49 /24s
Percentage of available LACNIC address space announced: 69.3

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: 9846
Total AfriNIC prefixes after maximum aggregation: 2222
AfriNIC Deaggregation factor: 4.43
Prefixes being announced from the AfriNIC address blocks: 10327
Unique aggregates announced from the AfriNIC address blocks: 3473
AfriNIC Region origin ASes present in the Internet Routing Table: 562
AfriNIC Prefixes per ASN: 18.38
AfriNIC Region origin ASes announcing only one prefix: 172
AfriNIC Region transit ASes present in the Internet Routing Table: 129
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: 41822720
Equivalent to 2 /8s, 126 /16s and 42 /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 2976 11429 901 Korea Telecom (KIX)
17974 2340 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1758 301 87 TPG Internet Pty Ltd
4755 1619 387 162 TATA Communications formerly
9829 1335 1106 41 BSNL National Internet Backbo
9583 1177 87 513 Sify Limited
7552 1129 1062 11 Vietel Corporation
4808 1124 2049 318 CNCGROUP IP network: China169
24560 1041 386 160 Bharti Airtel Ltd., Telemedia
9498 1009 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 3327 3734 185 bellsouth.net, inc.
7029 3155 990 161 Windstream Communications Inc
18566 2085 382 180 Covad Communications
1785 1913 678 128 PaeTec Communications, Inc.
22773 1885 2931 129 Cox Communications, Inc.
20115 1659 1580 615 Charter Communications
4323 1576 1153 386 Time Warner Telecom
30036 1388 273 744 Mediacom Communications Corp
7018 1245 10317 830 AT&T WorldNet Services
7011 1204 329 698 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 1736 544 16 Corbina telecom
2118 1399 97 14 EUnet/RELCOM Autonomous Syste
15557 1229 2247 55 LDCOM NETWORKS
12479 846 773 79 Uni2 Autonomous System
34984 766 205 179 BILISIM TELEKOM
6830 723 2313 447 UPC Distribution Services
20940 720 230 552 Akamai Technologies European
31148 709 37 9 FreeNet ISP
13188 676 100 9 Educational Network
58113 617 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 2155 368 223 TVCABLE BOGOTA
28573 2100 1248 54 NET Servicos de Comunicao S.A
8151 1574 3033 346 UniNet S.A. de C.V.
7303 1565 1034 199 Telecom Argentina Stet-France
6503 1534 435 68 AVANTEL, S.A.
6458 724 81 15 GUATEL
27947 721 74 94 Telconet S.A
3816 642 310 30 Empresa Nacional de Telecomun
11172 593 85 69 Servicios Alestra S.A de C.V
14420 580 83 101 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 880 275 36 LINKdotNET AS number
8452 808 958 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 205 12 13 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
6389 3327 3734 185 bellsouth.net, inc.
7029 3155 990 161 Windstream Communications Inc
4766 2976 11429 901 Korea Telecom (KIX)
17974 2340 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2155 368 223 TVCABLE BOGOTA
28573 2100 1248 54 NET Servicos de Comunicao S.A
18566 2085 382 180 Covad Communications
1785 1913 678 128 PaeTec Communications, Inc.
22773 1885 2931 129 Cox Communications, Inc.
7545 1758 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
7029 3155 2994 Windstream Communications Inc
17974 2340 2286 PT TELEKOMUNIKASI INDONESIA
4766 2976 2075 Korea Telecom (KIX)
28573 2100 2046 NET Servicos de Comunicao S.A
10620 2155 1932 TVCABLE BOGOTA
18566 2085 1905 Covad Communications
1785 1913 1785 PaeTec Communications, Inc.
22773 1885 1756 Cox Communications, Inc.
8402 1736 1720 Corbina telecom
7545 1758 1671 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
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 5.149.64.0/19 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
128.0.80.0/20 52041 Timer LTD
128.0.144.0/21 59675 >>UNKNOWN<<
128.0.176.0/20 30764 PODA s.r.o.

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 /11:84 /12:237
/13:477 /14:844 /15:1545 /16:12393 /17:6466 /18:10848
/19:21094 /20:30244 /21:32181 /22:42420 /23:39892 /24:224012
/25:1407 /26:1674 /27:922 /28:173 /29:63 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2642 3155 Windstream Communications Inc
18566 2035 2085 Covad Communications
6389 1849 3327 bellsouth.net, inc.
8402 1465 1736 Corbina telecom
30036 1323 1388 Mediacom Communications Corp
22773 1226 1885 Cox Communications, Inc.
15557 1173 1229 LDCOM NETWORKS
11492 1161 1198 Cable One
6503 1053 1534 AVANTEL, S.A.
1785 1014 1913 PaeTec Communications, Inc.

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

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

1:620 2:625 3:1 4:13 5:489 6:3
8:457 12:1999 13:1 14:668 15:11 16:3
17:6 20:27 23:206 24:1791 27:1333 31:1017
32:78 33:2 34:2 36:7 37:774 38:829
39:2 40:133 41:3065 42:158 44:3 46:1589
47:2 49:477 50:592 52:13 54:18 55:8
56:1 57:31 58:985 59:534 60:241 61:1290
62:951 63:1994 64:4269 65:2238 66:4504 67:2038
68:1170 69:3216 70:985 71:509 72:1870 74:2598
75:483 76:313 77:950 78:971 79:491 80:1267
81:959 82:627 83:530 84:625 85:1156 86:810
87:925 88:364 89:1790 90:302 91:5199 92:579
93:1537 94:1620 95:1259 96:416 97:319 98:988
99:39 100:23 101:261 103:1538 105:512 106:118
107:198 108:456 109:1944 110:798 111:968 112:452
113:706 114:658 115:841 116:893 117:732 118:940
119:1267 120:307 121:689 122:1644 123:1165 124:1348
125:1283 128:544 129:185 130:283 131:632 132:310
133:22 134:250 135:61 136:218 137:239 138:342
139:171 140:498 141:283 142:486 143:369 144:494
145:80 146:520 147:255 148:758 149:324 150:156
151:172 152:451 153:184 154:20 155:420 156:226
157:381 158:186 159:653 160:341 161:414 162:358
163:190 164:680 165:421 166:539 167:550 168:964
169:125 170:908 171:149 172:7 173:1683 174:614
175:442 176:779 177:1159 178:1636 180:1358 181:136
182:1053 183:295 184:603 186:2216 187:1241 188:1669
189:1574 190:6060 192:6028 193:5727 194:4558 195:3456
196:1209 197:218 198:3794 199:5000 200:5995 201:1973
202:8697 203:8726 204:4430 205:2531 206:2776 207:2874
208:4065 209:3662 210:2835 211:1534 212:2024 213:1813
214:887 215:87 216:5133 217:1554 218:567 219:315
220:1242 221:536 222:335 223:388

End of report
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