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, August 21, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 22 Aug, 2012

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

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

BGP routing table entries examined: 422720
Prefixes after maximum aggregation: 177453
Deaggregation factor: 2.38
Unique aggregates announced to Internet: 206189
Total ASes present in the Internet Routing Table: 41877
Prefixes per ASN: 10.09
Origin-only ASes present in the Internet Routing Table: 33488
Origin ASes announcing only one prefix: 15732
Transit ASes present in the Internet Routing Table: 5616
Transit-only ASes present in the Internet Routing Table: 141
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: 575
Unregistered ASNs in the Routing Table: 197
Number of 32-bit ASNs allocated by the RIRs: 3143
Number of 32-bit ASNs visible in the Routing Table: 2773
Prefixes from 32-bit ASNs in the Routing Table: 7183
Special use prefixes present in the Routing Table: 0
Prefixes being announced from unallocated address space: 179
Number of addresses announced to Internet: 2589143340
Equivalent to 154 /8s, 83 /16s and 49 /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: 148930

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

Prefixes being announced by APNIC Region ASes: 101997
Total APNIC prefixes after maximum aggregation: 32748
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 102581
Unique aggregates announced from the APNIC address blocks: 42472
APNIC Region origin ASes present in the Internet Routing Table: 4737
APNIC Prefixes per ASN: 21.66
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 762
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: 285
Number of APNIC addresses announced to Internet: 707693728
Equivalent to 42 /8s, 46 /16s and 140 /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: 153852
Total ARIN prefixes after maximum aggregation: 77889
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 154851
Unique aggregates announced from the ARIN address blocks: 68833
ARIN Region origin ASes present in the Internet Routing Table: 15223
ARIN Prefixes per ASN: 10.17
ARIN Region origin ASes announcing only one prefix: 5761
ARIN Region transit ASes present in the Internet Routing Table: 1603
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: 1084336512
Equivalent to 64 /8s, 161 /16s and 169 /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: 106698
Total RIPE prefixes after maximum aggregation: 56114
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 108944
Unique aggregates announced from the RIPE address blocks: 69119
RIPE Region origin ASes present in the Internet Routing Table: 16783
RIPE Prefixes per ASN: 6.49
RIPE Region origin ASes announcing only one prefix: 8133
RIPE Region transit ASes present in the Internet Routing Table: 2722
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: 1806
Number of RIPE addresses announced to Internet: 640796644
Equivalent to 38 /8s, 49 /16s and 199 /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: 43197
Total LACNIC prefixes after maximum aggregation: 8449
LACNIC Deaggregation factor: 5.11
Prefixes being announced from the LACNIC address blocks: 46055
Unique aggregates announced from the LACNIC address blocks: 22169
LACNIC Region origin ASes present in the Internet Routing Table: 1629
LACNIC Prefixes per ASN: 28.27
LACNIC Region origin ASes announcing only one prefix: 426
LACNIC Region transit ASes present in the Internet Routing Table: 316
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: 659
Number of LACNIC addresses announced to Internet: 114304808
Equivalent to 6 /8s, 208 /16s and 39 /24s
Percentage of available LACNIC address space announced: 68.1

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: 9647
Total AfriNIC prefixes after maximum aggregation: 2198
AfriNIC Deaggregation factor: 4.39
Prefixes being announced from the AfriNIC address blocks: 10110
Unique aggregates announced from the AfriNIC address blocks: 3449
AfriNIC Region origin ASes present in the Internet Routing Table: 557
AfriNIC Prefixes per ASN: 18.15
AfriNIC Region origin ASes announcing only one prefix: 173
AfriNIC Region transit ASes present in the Internet Routing Table: 122
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: 41679360
Equivalent to 2 /8s, 123 /16s and 250 /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 2809 11119 1293 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1718 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 1136 2056 326 CNCGROUP IP network: China169
7552 1108 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1001 294 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 3445 990 154 Windstream Communications Inc
6389 3365 3772 194 bellsouth.net, inc.
18566 2087 382 180 Covad Communications
1785 1938 680 128 PaeTec Communications, Inc.
22773 1820 2930 128 Cox Communications, Inc.
20115 1647 1573 608 Charter Communications
4323 1573 1026 385 Time Warner Telecom
30036 1399 276 784 Mediacom Communications Corp
7018 1240 10034 808 AT&T WorldNet Services
11492 1195 217 347 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 1595 544 16 Corbina telecom
15557 1216 2247 55 LDCOM NETWORKS
12479 827 764 85 Uni2 Autonomous System
34984 750 189 175 BILISIM TELEKOM
6830 715 2311 446 UPC Distribution Services
31148 712 37 9 FreeNet ISP
20940 703 226 546 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 2021 1244 55 NET Servicos de Comunicao S.A
7303 1564 1033 201 Telecom Argentina Stet-France
6503 1530 435 68 AVANTEL, S.A.
8151 1475 3032 347 UniNet S.A. de C.V.
6458 884 81 15 GUATEL
27947 715 74 95 Telconet S.A
3816 602 255 90 Empresa Nacional de Telecomun
11172 590 85 69 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
8452 895 958 13 TEDATA
24863 869 275 36 LINKdotNET AS number
36998 532 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 286 80 8 RAYA Telecom - Egypt
3741 262 904 223 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 3445 990 154 Windstream Communications Inc
6389 3365 3772 194 bellsouth.net, inc.
4766 2809 11119 1293 Korea Telecom (KIX)
17974 2342 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2093 356 215 TVCABLE BOGOTA
18566 2087 382 180 Covad Communications
28573 2021 1244 55 NET Servicos de Comunicao S.A
1785 1938 680 128 PaeTec Communications, Inc.
22773 1820 2930 128 Cox Communications, Inc.
7545 1718 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 3365 3171 bellsouth.net, inc.
17974 2342 2288 PT TELEKOMUNIKASI INDONESIA
28573 2021 1966 NET Servicos de Comunicao S.A
18566 2087 1907 Covad Communications
10620 2093 1878 TVCABLE BOGOTA
1785 1938 1810 PaeTec Communications, Inc.
22773 1820 1692 Cox Communications, Inc.
7545 1718 1631 TPG Internet Pty Ltd
8402 1595 1579 Corbina telecom
4766 2809 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
31.169.48.0/21 50304 Blix Solutions AS

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 /14:839 /15:1534 /16:12366 /17:6398 /18:10833
/19:21013 /20:30068 /21:31978 /22:41933 /23:39723 /24:221241
/25:1271 /26:1511 /27:878 /28:173 /29:62 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2805 3445 Windstream Communications Inc
18566 2037 2087 Covad Communications
6389 1856 3365 bellsouth.net, inc.
30036 1334 1399 Mediacom Communications Corp
8402 1324 1595 Corbina telecom
22773 1170 1820 Cox Communications, Inc.
15557 1160 1216 LDCOM NETWORKS
11492 1158 1195 Cable One
6503 1050 1530 AVANTEL, S.A.
1785 1040 1938 PaeTec Communications, Inc.

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

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

1:554 2:792 3:1 4:13 5:362 6:3
8:440 12:2008 13:1 14:642 15:11 16:3
17:6 20:27 23:201 24:1802 27:1335 31:1032
32:56 33:2 34:2 36:8 37:733 38:823
39:1 40:133 41:2872 42:156 44:3 46:1586
47:2 49:435 50:586 52:13 54:16 55:6
56:1 57:31 58:987 59:519 60:238 61:1283
62:990 63:2008 64:4264 65:2238 66:4539 67:2055
68:1156 69:3205 70:987 71:522 72:1864 74:2609
75:491 76:330 77:949 78:907 79:495 80:1274
81:956 82:638 83:534 84:621 85:1133 86:786
87:941 88:349 89:1807 90:301 91:5115 92:590
93:1485 94:1586 95:1270 96:411 97:317 98:899
99:39 100:22 101:260 103:1409 105:512 106:114
107:194 108:430 109:1916 110:797 111:955 112:434
113:685 114:653 115:836 116:883 117:726 118:940
119:1260 120:301 121:694 122:1654 123:1172 124:1351
125:1265 128:523 129:185 130:275 131:627 132:294
133:22 134:245 135:61 136:217 137:239 138:339
139:186 140:501 141:275 142:483 143:363 144:490
145:79 146:511 147:253 148:779 149:300 150:155
151:168 152:457 153:175 154:20 155:408 156:224
157:382 158:179 159:637 160:348 161:408 162:401
163:189 164:687 165:412 166:561 167:540 168:954
169:125 170:907 171:145 172:5 173:1723 174:632
175:437 176:604 177:1022 178:1686 180:1343 181:125
182:1037 183:221 184:578 186:2103 187:1128 188:1468
189:1576 190:6152 192:6009 193:5459 194:4232 195:3261
196:1231 197:208 198:3717 199:4915 200:6025 201:1973
202:8701 203:8660 204:4398 205:2533 206:2814 207:2858
208:4039 209:3638 210:2789 211:1541 212:2019 213:1800
214:885 215:85 216:5134 217:1548 218:547 219:316
220:1240 221:530 222:337 223:381

End of report
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