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, October 10, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 11 Oct, 2012

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

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

BGP routing table entries examined: 428098
Prefixes after maximum aggregation: 179067
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 210383
Total ASes present in the Internet Routing Table: 42324
Prefixes per ASN: 10.11
Origin-only ASes present in the Internet Routing Table: 33720
Origin ASes announcing only one prefix: 15781
Transit ASes present in the Internet Routing Table: 5623
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: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 827
Unregistered ASNs in the Routing Table: 297
Number of 32-bit ASNs allocated by the RIRs: 3365
Number of 32-bit ASNs visible in the Routing Table: 2981
Prefixes from 32-bit ASNs in the Routing Table: 8167
Special use prefixes present in the Routing Table: 12
Prefixes being announced from unallocated address space: 151
Number of addresses announced to Internet: 2606067564
Equivalent to 155 /8s, 85 /16s and 111 /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: 93.7
Total number of prefixes smaller than registry allocations: 149976

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

Prefixes being announced by APNIC Region ASes: 102931
Total APNIC prefixes after maximum aggregation: 32500
APNIC Deaggregation factor: 3.17
Prefixes being announced from the APNIC address blocks: 103646
Unique aggregates announced from the APNIC address blocks: 42861
APNIC Region origin ASes present in the Internet Routing Table: 4770
APNIC Prefixes per ASN: 21.73
APNIC Region origin ASes announcing only one prefix: 1242
APNIC Region transit ASes present in the Internet Routing Table: 779
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 26
Number of APNIC region 32-bit ASNs visible in the Routing Table: 326
Number of APNIC addresses announced to Internet: 710970272
Equivalent to 42 /8s, 96 /16s and 139 /24s
Percentage of available APNIC address space announced: 83.1

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: 154536
Total ARIN prefixes after maximum aggregation: 78279
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 155393
Unique aggregates announced from the ARIN address blocks: 69405
ARIN Region origin ASes present in the Internet Routing Table: 15270
ARIN Prefixes per ASN: 10.18
ARIN Region origin ASes announcing only one prefix: 5782
ARIN Region transit ASes present in the Internet Routing Table: 1595
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 22
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1086790528
Equivalent to 64 /8s, 199 /16s and 27 /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: 109016
Total RIPE prefixes after maximum aggregation: 57350
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 111685
Unique aggregates announced from the RIPE address blocks: 71861
RIPE Region origin ASes present in the Internet Routing Table: 16897
RIPE Prefixes per ASN: 6.61
RIPE Region origin ASes announcing only one prefix: 8131
RIPE Region transit ASes present in the Internet Routing Table: 2719
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: 1937
Number of RIPE addresses announced to Internet: 648188708
Equivalent to 38 /8s, 162 /16s and 147 /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: 43756
Total LACNIC prefixes after maximum aggregation: 8638
LACNIC Deaggregation factor: 5.07
Prefixes being announced from the LACNIC address blocks: 47182
Unique aggregates announced from the LACNIC address blocks: 22584
LACNIC Region origin ASes present in the Internet Routing Table: 1667
LACNIC Prefixes per ASN: 28.30
LACNIC Region origin ASes announcing only one prefix: 453
LACNIC Region transit ASes present in the Internet Routing Table: 318
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: 695
Number of LACNIC addresses announced to Internet: 117662760
Equivalent to 7 /8s, 3 /16s and 100 /24s
Percentage of available LACNIC address space announced: 70.1

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: 9570
Total AfriNIC prefixes after maximum aggregation: 2243
AfriNIC Deaggregation factor: 4.27
Prefixes being announced from the AfriNIC address blocks: 10041
Unique aggregates announced from the AfriNIC address blocks: 3538
AfriNIC Region origin ASes present in the Internet Routing Table: 565
AfriNIC Prefixes per ASN: 17.77
AfriNIC Region origin ASes announcing only one prefix: 173
AfriNIC Region transit ASes present in the Internet Routing Table: 125
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: 6
Number of AfriNIC addresses announced to Internet: 42166784
Equivalent to 2 /8s, 131 /16s and 106 /24s
Percentage of available AfriNIC address space announced: 41.9

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 2974 11428 902 Korea Telecom (KIX)
17974 2365 830 54 PT TELEKOMUNIKASI INDONESIA
7545 1773 301 88 TPG Internet Pty Ltd
4755 1625 387 163 TATA Communications formerly
9829 1399 1154 41 BSNL National Internet Backbo
9583 1226 90 518 Sify Limited
4808 1124 2060 316 CNCGROUP IP network: China169
7552 1118 1062 11 Vietel Corporation
24560 1035 385 162 Bharti Airtel Ltd., Telemedia
9498 1021 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 3227 3727 172 bellsouth.net, inc.
7029 3127 990 162 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1925 678 128 PaeTec Communications, Inc.
22773 1906 2931 128 Cox Communications, Inc.
20115 1655 1582 618 Charter Communications
4323 1586 1155 392 Time Warner Telecom
30036 1356 271 745 Mediacom Communications Corp
7018 1269 10304 844 AT&T WorldNet Services
7011 1206 329 700 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 1806 544 16 Corbina telecom
2118 1396 97 14 EUnet/RELCOM Autonomous Syste
12479 848 776 64 Uni2 Autonomous System
34984 793 206 180 BILISIM TELEKOM
6830 725 2313 445 UPC Distribution Services
31148 724 37 9 FreeNet ISP
20940 704 222 536 Akamai Technologies European
13188 696 92 156 Educational Network
58113 603 67 364 LIR DATACENTER TELECOM SRL
8551 575 364 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 2200 379 222 TVCABLE BOGOTA
28573 2094 1276 65 NET Servicos de Comunicao S.A
8151 1596 3066 349 UniNet S.A. de C.V.
7303 1566 1035 202 Telecom Argentina Stet-France
6503 1539 435 69 AVANTEL, S.A.
27947 727 74 91 Telconet S.A
3816 648 309 70 Empresa Nacional de Telecomun
11172 592 85 66 Servicios Alestra S.A de C.V
14420 589 87 101 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 891 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 686 958 13 TEDATA
6713 517 650 19 Itissalat Al-MAGHRIB
24835 270 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 192 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 172 682 85 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 3227 3727 172 bellsouth.net, inc.
7029 3127 990 162 Windstream Communications Inc
4766 2974 11428 902 Korea Telecom (KIX)
17974 2365 830 54 PT TELEKOMUNIKASI INDONESIA
10620 2200 379 222 TVCABLE BOGOTA
28573 2094 1276 65 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1925 678 128 PaeTec Communications, Inc.
22773 1906 2931 128 Cox Communications, Inc.
8402 1806 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 3127 2965 Windstream Communications Inc
17974 2365 2311 PT TELEKOMUNIKASI INDONESIA
4766 2974 2072 Korea Telecom (KIX)
28573 2094 2029 NET Servicos de Comunicao S.A
10620 2200 1978 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1925 1797 PaeTec Communications, Inc.
8402 1806 1790 Corbina telecom
22773 1906 1778 Cox Communications, Inc.
7545 1773 1685 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
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.80.0/20 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
128.0.170.0/24 24685 ISP Elencom autonomous system

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 /12:242
/13:477 /14:849 /15:1547 /16:12441 /17:6491 /18:10877
/19:21161 /20:30428 /21:32430 /22:42844 /23:40073 /24:223879
/25:1349 /26:1669 /27:908 /28:178 /29:65 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2617 3127 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1802 3227 bellsouth.net, inc.
8402 1522 1806 Corbina telecom
30036 1286 1356 Mediacom Communications Corp
22773 1245 1906 Cox Communications, Inc.
11492 1164 1201 Cable One
6503 1054 1539 AVANTEL, S.A.
1785 1016 1925 PaeTec Communications, Inc.
7011 945 1206 Citizens Utilities

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

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

1:628 2:784 3:1 4:13 5:560 6:3
8:470 12:1975 13:1 14:670 15:11 16:3
17:6 20:27 23:202 24:1786 27:1373 31:1021
32:54 33:2 34:2 36:7 37:842 38:830
39:2 40:133 41:2764 42:158 44:3 46:1615
47:2 49:455 50:595 52:12 54:24 55:8
56:3 57:27 58:987 59:542 60:237 61:1289
62:936 63:2000 64:4279 65:2225 66:4510 67:2097
68:1154 69:3226 70:956 71:505 72:1862 74:2607
75:483 76:267 77:964 78:973 79:502 80:1246
81:969 82:633 83:538 84:524 85:1164 86:482
87:936 88:364 89:1820 90:304 91:5239 92:597
93:1514 94:1630 95:1115 96:396 97:325 98:966
99:39 100:29 101:266 103:1627 105:512 106:120
107:199 108:473 109:1593 110:806 111:966 112:445
113:706 114:620 115:894 116:890 117:738 118:961
119:1232 120:340 121:688 122:1636 123:1163 124:1328
125:1281 128:562 129:195 130:288 131:638 132:309
133:22 134:253 135:62 136:221 137:239 138:338
139:172 140:498 141:286 142:485 143:387 144:493
145:82 146:507 147:282 148:748 149:328 150:159
151:205 152:451 153:179 154:20 155:425 156:226
157:373 158:258 159:661 160:346 161:411 162:364
163:191 164:708 165:424 166:525 167:552 168:984
169:127 170:904 171:148 172:7 173:1664 174:615
175:428 176:784 177:1281 178:1622 180:1344 181:149
182:1072 183:296 184:608 185:24 186:2254 187:1307
188:1740 189:1589 190:5817 192:6047 193:5754 194:4610
195:3664 196:1225 197:232 198:3837 199:5066 200:6009
201:1961 202:8643 203:8697 204:4404 205:2551 206:2766
207:2836 208:4060 209:3642 210:2825 211:1532 212:2008
213:1817 214:883 215:87 216:5105 217:1573 218:571
219:313 220:1250 221:534 222:337 223:416

End of report
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