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.

Thursday, October 11, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 428478
Prefixes after maximum aggregation: 179238
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 210523
Total ASes present in the Internet Routing Table: 42336
Prefixes per ASN: 10.12
Origin-only ASes present in the Internet Routing Table: 33733
Origin ASes announcing only one prefix: 15789
Transit ASes present in the Internet Routing Table: 5620
Transit-only ASes present in the Internet Routing Table: 142
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: 830
Unregistered ASNs in the Routing Table: 300
Number of 32-bit ASNs allocated by the RIRs: 3368
Number of 32-bit ASNs visible in the Routing Table: 2983
Prefixes from 32-bit ASNs in the Routing Table: 8180
Special use prefixes present in the Routing Table: 13
Prefixes being announced from unallocated address space: 158
Number of addresses announced to Internet: 2606154860
Equivalent to 155 /8s, 86 /16s and 196 /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: 93.8
Total number of prefixes smaller than registry allocations: 150201

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

Prefixes being announced by APNIC Region ASes: 103049
Total APNIC prefixes after maximum aggregation: 32547
APNIC Deaggregation factor: 3.17
Prefixes being announced from the APNIC address blocks: 103770
Unique aggregates announced from the APNIC address blocks: 42949
APNIC Region origin ASes present in the Internet Routing Table: 4774
APNIC Prefixes per ASN: 21.74
APNIC Region origin ASes announcing only one prefix: 1244
APNIC Region transit ASes present in the Internet Routing Table: 778
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: 327
Number of APNIC addresses announced to Internet: 711091616
Equivalent to 42 /8s, 98 /16s and 101 /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: 154703
Total ARIN prefixes after maximum aggregation: 78331
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 155546
Unique aggregates announced from the ARIN address blocks: 69407
ARIN Region origin ASes present in the Internet Routing Table: 15270
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5780
ARIN Region transit ASes present in the Internet Routing Table: 1592
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: 1086816128
Equivalent to 64 /8s, 199 /16s and 127 /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: 109056
Total RIPE prefixes after maximum aggregation: 57400
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 111721
Unique aggregates announced from the RIPE address blocks: 71910
RIPE Region origin ASes present in the Internet Routing Table: 16901
RIPE Prefixes per ASN: 6.61
RIPE Region origin ASes announcing only one prefix: 8132
RIPE Region transit ASes present in the Internet Routing Table: 2718
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: 1940
Number of RIPE addresses announced to Internet: 648119076
Equivalent to 38 /8s, 161 /16s and 131 /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: 43778
Total LACNIC prefixes after maximum aggregation: 8661
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 47224
Unique aggregates announced from the LACNIC address blocks: 22577
LACNIC Region origin ASes present in the Internet Routing Table: 1668
LACNIC Prefixes per ASN: 28.31
LACNIC Region origin ASes announcing only one prefix: 458
LACNIC Region transit ASes present in the Internet Routing Table: 319
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: 693
Number of LACNIC addresses announced to Internet: 117667112
Equivalent to 7 /8s, 3 /16s and 117 /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: 9590
Total AfriNIC prefixes after maximum aggregation: 2242
AfriNIC Deaggregation factor: 4.28
Prefixes being announced from the AfriNIC address blocks: 10059
Unique aggregates announced from the AfriNIC address blocks: 3539
AfriNIC Region origin ASes present in the Internet Routing Table: 565
AfriNIC Prefixes per ASN: 17.80
AfriNIC Region origin ASes announcing only one prefix: 175
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: 42165504
Equivalent to 2 /8s, 131 /16s and 101 /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 2975 11428 902 Korea Telecom (KIX)
17974 2365 830 54 PT TELEKOMUNIKASI INDONESIA
7545 1770 301 87 TPG Internet Pty Ltd
4755 1626 387 163 TATA Communications formerly
9829 1401 1154 41 BSNL National Internet Backbo
9583 1226 90 518 Sify Limited
7552 1118 1062 11 Vietel Corporation
4808 1113 2060 316 CNCGROUP IP network: China169
24560 1031 385 162 Bharti Airtel Ltd., Telemedia
9498 1022 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 3206 3727 172 bellsouth.net, inc.
7029 3128 990 162 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1925 678 128 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
20115 1655 1582 618 Charter Communications
4323 1586 1155 392 Time Warner Telecom
30036 1341 268 751 Mediacom Communications Corp
7018 1272 10304 847 AT&T WorldNet Services
7011 1207 329 701 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 1800 544 16 Corbina telecom
2118 1396 97 14 EUnet/RELCOM Autonomous Syste
12479 848 776 64 Uni2 Autonomous System
34984 797 206 182 BILISIM TELEKOM
31148 726 37 9 FreeNet ISP
6830 725 2313 445 UPC Distribution Services
20940 708 224 539 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 2203 379 219 TVCABLE BOGOTA
28573 2122 1277 60 NET Servicos de Comunicao S.A
8151 1596 3068 350 UniNet S.A. de C.V.
7303 1567 1035 203 Telecom Argentina Stet-France
6503 1539 435 69 AVANTEL, S.A.
27947 728 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 892 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 672 958 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 3206 3727 172 bellsouth.net, inc.
7029 3128 990 162 Windstream Communications Inc
4766 2975 11428 902 Korea Telecom (KIX)
17974 2365 830 54 PT TELEKOMUNIKASI INDONESIA
10620 2203 379 219 TVCABLE BOGOTA
28573 2122 1277 60 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1925 678 128 PaeTec Communications, Inc.
22773 1907 2931 128 Cox Communications, Inc.
8402 1800 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 3128 2966 Windstream Communications Inc
17974 2365 2311 PT TELEKOMUNIKASI INDONESIA
4766 2975 2073 Korea Telecom (KIX)
28573 2122 2062 NET Servicos de Comunicao S.A
10620 2203 1984 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1925 1797 PaeTec Communications, Inc.
8402 1800 1784 Corbina telecom
22773 1907 1779 Cox Communications, Inc.
7545 1770 1683 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
128.0.72.0/21 23456 32-bit ASN transition
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

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 /15:1546 /16:12444 /17:6494 /18:10871
/19:21140 /20:30432 /21:32413 /22:42860 /23:40115 /24:224234
/25:1352 /26:1673 /27:902 /28:180 /29:64 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2618 3128 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1797 3206 bellsouth.net, inc.
8402 1514 1800 Corbina telecom
30036 1272 1341 Mediacom Communications Corp
22773 1246 1907 Cox Communications, Inc.
11492 1165 1202 Cable One
6503 1054 1539 AVANTEL, S.A.
1785 1016 1925 PaeTec Communications, Inc.
7011 946 1207 Citizens Utilities

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

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

1:628 2:778 3:1 4:13 5:566 6:3
8:470 12:1974 13:1 14:670 15:11 16:3
17:6 20:27 23:202 24:1790 27:1374 31:1017
32:54 33:2 34:2 36:7 37:840 38:830
39:2 40:137 41:2771 42:158 44:3 46:1614
47:2 49:456 50:590 52:12 54:24 55:7
56:3 57:27 58:987 59:542 60:237 61:1292
62:937 63:1999 64:4279 65:2232 66:4540 67:2097
68:1154 69:3226 70:987 71:505 72:1880 74:2606
75:483 76:309 77:970 78:969 79:501 80:1245
81:968 82:634 83:537 84:525 85:1158 86:486
87:947 88:364 89:1827 90:302 91:5245 92:597
93:1515 94:1631 95:1118 96:396 97:325 98:962
99:39 100:28 101:269 103:1640 105:512 106:120
107:199 108:473 109:1591 110:807 111:966 112:442
113:713 114:621 115:895 116:888 117:736 118:967
119:1231 120:342 121:688 122:1641 123:1152 124:1336
125:1283 128:564 129:196 130:288 131:639 132:309
133:22 134:252 135:62 136:221 137:239 138:337
139:172 140:501 141:286 142:489 143:385 144:496
145:82 146:508 147:276 148:748 149:328 150:159
151:208 152:451 153:179 154:20 155:426 156:227
157:373 158:259 159:660 160:346 161:410 162:364
163:191 164:709 165:425 166:525 167:553 168:987
169:127 170:914 171:152 172:7 173:1661 174:625
175:449 176:786 177:1272 178:1621 180:1348 181:149
182:1088 183:305 184:610 185:24 186:2256 187:1324
188:1738 189:1597 190:5819 192:6045 193:5755 194:4617
195:3669 196:1232 197:232 198:3843 199:5068 200:6005
201:1961 202:8655 203:8697 204:4405 205:2535 206:2766
207:2838 208:4060 209:3640 210:2838 211:1532 212:2015
213:1817 214:890 215:89 216:5128 217:1569 218:571
219:314 220:1250 221:533 222:337 223:416

End of report
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