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, November 1, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 02 Nov, 2012

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

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

BGP routing table entries examined: 428845
Prefixes after maximum aggregation: 179224
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 211193
Total ASes present in the Internet Routing Table: 42308
Prefixes per ASN: 10.14
Origin-only ASes present in the Internet Routing Table: 33597
Origin ASes announcing only one prefix: 15731
Transit ASes present in the Internet Routing Table: 5658
Transit-only ASes present in the Internet Routing Table: 144
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 42
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 906
Unregistered ASNs in the Routing Table: 329
Number of 32-bit ASNs allocated by the RIRs: 3423
Number of 32-bit ASNs visible in the Routing Table: 3053
Prefixes from 32-bit ASNs in the Routing Table: 8263
Special use prefixes present in the Routing Table: 14
Prefixes being announced from unallocated address space: 161
Number of addresses announced to Internet: 2609311468
Equivalent to 155 /8s, 134 /16s and 238 /24s
Percentage of available address space announced: 70.5
Percentage of allocated address space announced: 70.5
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: 150514

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

Prefixes being announced by APNIC Region ASes: 103919
Total APNIC prefixes after maximum aggregation: 32601
APNIC Deaggregation factor: 3.19
Prefixes being announced from the APNIC address blocks: 104697
Unique aggregates announced from the APNIC address blocks: 42978
APNIC Region origin ASes present in the Internet Routing Table: 4791
APNIC Prefixes per ASN: 21.85
APNIC Region origin ASes announcing only one prefix: 1249
APNIC Region transit ASes present in the Internet Routing Table: 784
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: 344
Number of APNIC addresses announced to Internet: 712537504
Equivalent to 42 /8s, 120 /16s and 117 /24s
Percentage of available APNIC address space announced: 83.3

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: 154204
Total ARIN prefixes after maximum aggregation: 77995
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155041
Unique aggregates announced from the ARIN address blocks: 69569
ARIN Region origin ASes present in the Internet Routing Table: 15107
ARIN Prefixes per ASN: 10.26
ARIN Region origin ASes announcing only one prefix: 5697
ARIN Region transit ASes present in the Internet Routing Table: 1589
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 42
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1087043968
Equivalent to 64 /8s, 202 /16s and 249 /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: 108526
Total RIPE prefixes after maximum aggregation: 57585
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 111202
Unique aggregates announced from the RIPE address blocks: 72183
RIPE Region origin ASes present in the Internet Routing Table: 16917
RIPE Prefixes per ASN: 6.57
RIPE Region origin ASes announcing only one prefix: 8138
RIPE Region transit ASes present in the Internet Routing Table: 2743
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1981
Number of RIPE addresses announced to Internet: 648297380
Equivalent to 38 /8s, 164 /16s and 59 /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: 44199
Total LACNIC prefixes after maximum aggregation: 8753
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 47641
Unique aggregates announced from the LACNIC address blocks: 22866
LACNIC Region origin ASes present in the Internet Routing Table: 1697
LACNIC Prefixes per ASN: 28.07
LACNIC Region origin ASes announcing only one prefix: 476
LACNIC Region transit ASes present in the Internet Routing Table: 324
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 705
Number of LACNIC addresses announced to Internet: 118481704
Equivalent to 7 /8s, 15 /16s and 227 /24s
Percentage of available LACNIC address space announced: 70.6

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: 9619
Total AfriNIC prefixes after maximum aggregation: 2237
AfriNIC Deaggregation factor: 4.30
Prefixes being announced from the AfriNIC address blocks: 10103
Unique aggregates announced from the AfriNIC address blocks: 3460
AfriNIC Region origin ASes present in the Internet Routing Table: 567
AfriNIC Prefixes per ASN: 17.82
AfriNIC Region origin ASes announcing only one prefix: 171
AfriNIC Region transit ASes present in the Internet Routing Table: 127
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: 42642688
Equivalent to 2 /8s, 138 /16s and 173 /24s
Percentage of available AfriNIC address space announced: 42.4

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 2972 11558 900 Korea Telecom (KIX)
17974 2431 829 55 PT TELEKOMUNIKASI INDONESIA
7545 1801 301 88 TPG Internet Pty Ltd
4755 1618 376 159 TATA Communications formerly
9829 1408 1154 41 BSNL National Internet Backbo
9583 1190 88 508 Sify Limited
4808 1111 2056 315 CNCGROUP IP network: China169
7552 1107 1062 11 Vietel Corporation
24560 1035 385 162 Bharti Airtel Ltd., Telemedia
9498 1018 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 3170 3723 161 bellsouth.net, inc.
7029 3132 990 162 Windstream Communications Inc
18566 2084 382 180 Covad Communications
22773 1970 2931 129 Cox Communications, Inc.
1785 1833 678 126 PaeTec Communications, Inc.
20115 1665 1585 627 Charter Communications
4323 1592 1153 392 Time Warner Telecom
30036 1347 272 753 Mediacom Communications Corp
7018 1256 10289 841 AT&T WorldNet Services
7011 1222 334 692 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 1827 544 16 Corbina telecom
12479 851 776 64 Uni2 Autonomous System
34984 823 207 198 BILISIM TELEKOM
31148 728 37 9 FreeNet ISP
6830 722 2314 444 UPC Distribution Services
13188 709 93 136 Educational Network
20940 700 223 549 Akamai Technologies European
58113 601 66 364 LIR DATACENTER TELECOM SRL
8551 596 364 61 Bezeq International
3320 497 8440 407 Deutsche Telekom AG

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 2233 380 225 TVCABLE BOGOTA
28573 2036 1279 67 NET Servicos de Comunicao S.A
7303 1662 1132 202 Telecom Argentina Stet-France
8151 1591 3024 356 UniNet S.A. de C.V.
6503 1539 435 67 AVANTEL, S.A.
27947 746 77 91 Telconet S.A
3816 656 309 69 Empresa Nacional de Telecomun
14420 594 90 103 CORPORACION NACIONAL DE TELEC
11172 589 85 65 Servicios Alestra S.A de C.V
7738 582 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 896 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 558 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 287 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 172 697 88 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 3170 3723 161 bellsouth.net, inc.
7029 3132 990 162 Windstream Communications Inc
4766 2972 11558 900 Korea Telecom (KIX)
17974 2431 829 55 PT TELEKOMUNIKASI INDONESIA
10620 2233 380 225 TVCABLE BOGOTA
18566 2084 382 180 Covad Communications
28573 2036 1279 67 NET Servicos de Comunicao S.A
22773 1970 2931 129 Cox Communications, Inc.
1785 1833 678 126 PaeTec Communications, Inc.
8402 1827 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 3132 2970 Windstream Communications Inc
17974 2431 2376 PT TELEKOMUNIKASI INDONESIA
4766 2972 2072 Korea Telecom (KIX)
10620 2233 2008 TVCABLE BOGOTA
28573 2036 1969 NET Servicos de Comunicao S.A
18566 2084 1904 Covad Communications
22773 1970 1841 Cox Communications, Inc.
8402 1827 1811 Corbina telecom
7545 1801 1713 TPG Internet Pty Ltd
1785 1833 1707 PaeTec Communications, Inc.

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
61408 UNALLOCATED 5.56.0.0/21 174 Cogent Communication
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 3549 Global Crossing
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.

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
128.0.106.0/24 23456 32-bit ASN transition
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

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 /12:243
/13:478 /14:849 /15:1546 /16:12452 /17:6532 /18:10855
/19:21233 /20:30600 /21:32561 /22:42917 /23:40251 /24:223928
/25:1351 /26:1695 /27:905 /28:182 /29:77 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2620 3132 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1786 3170 bellsouth.net, inc.
8402 1530 1827 Corbina telecom
22773 1301 1970 Cox Communications, Inc.
30036 1265 1347 Mediacom Communications Corp
11492 1152 1187 Cable One
6503 1054 1539 AVANTEL, S.A.
7011 957 1222 Citizens Utilities
1785 944 1833 PaeTec Communications, Inc.

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

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

1:647 2:790 3:1 4:13 5:590 6:3
8:472 12:1940 13:3 14:684 15:11 16:3
17:6 20:27 23:209 24:1804 27:1367 31:1032
32:54 33:2 34:2 36:7 37:925 38:800
39:2 40:137 41:2710 42:175 44:3 46:1625
47:2 49:473 50:600 52:12 54:27 55:6
56:4 57:27 58:985 59:547 60:236 61:1291
62:950 63:1964 64:4227 65:2173 66:4473 67:2100
68:1155 69:3209 70:945 71:505 72:1870 74:2599
75:479 76:267 77:976 78:990 79:510 80:1231
81:984 82:621 83:541 84:526 85:1149 86:491
87:941 88:356 89:1789 90:306 91:5294 92:580
93:1414 94:1675 95:1310 96:410 97:324 98:965
99:39 100:31 101:294 103:1732 105:514 106:102
107:199 108:473 109:1625 110:828 111:977 112:437
113:734 114:668 115:874 116:888 117:762 118:957
119:1223 120:361 121:694 122:1693 123:1160 124:1344
125:1288 128:576 129:198 130:276 131:665 132:314
133:142 134:251 135:61 136:218 137:238 138:335
139:170 140:501 141:290 142:491 143:376 144:488
145:82 146:522 147:274 148:730 149:326 150:156
151:205 152:452 153:183 154:21 155:433 156:225
157:366 158:288 159:667 160:333 161:414 162:366
163:191 164:711 165:445 166:514 167:554 168:1000
169:129 170:916 171:152 172:6 173:1693 174:637
175:457 176:768 177:1388 178:1626 180:1363 181:164
182:1108 183:299 184:614 185:50 186:2253 187:1400
188:1724 189:1618 190:5917 192:6030 193:5402 194:4083
195:3449 196:1235 197:247 198:3884 199:5066 200:6013
201:1966 202:8691 203:8730 204:4373 205:2526 206:2721
207:2784 208:4004 209:3582 210:2833 211:1534 212:2087
213:1836 214:885 215:75 216:5129 217:1574 218:575
219:308 220:1257 221:531 222:337 223:401

End of report
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