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, July 19, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 20 Jul, 2012

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

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

BGP routing table entries examined: 417735
Prefixes after maximum aggregation: 176140
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 203395
Total ASes present in the Internet Routing Table: 41540
Prefixes per ASN: 10.06
Origin-only ASes present in the Internet Routing Table: 33338
Origin ASes announcing only one prefix: 15691
Transit ASes present in the Internet Routing Table: 5588
Transit-only ASes present in the Internet Routing Table: 136
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 30
Max AS path prepend of ASN ( 51742) 24
Prefixes from unregistered ASNs in the Routing Table: 367
Unregistered ASNs in the Routing Table: 134
Number of 32-bit ASNs allocated by the RIRs: 3007
Number of 32-bit ASNs visible in the Routing Table: 2614
Prefixes from 32-bit ASNs in the Routing Table: 6730
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 165
Number of addresses announced to Internet: 2566981676
Equivalent to 153 /8s, 1 /16s and 8 /24s
Percentage of available address space announced: 69.3
Percentage of allocated address space announced: 69.3
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.0
Total number of prefixes smaller than registry allocations: 145107

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

Prefixes being announced by APNIC Region ASes: 102081
Total APNIC prefixes after maximum aggregation: 32795
APNIC Deaggregation factor: 3.11
Prefixes being announced from the APNIC address blocks: 102546
Unique aggregates announced from the APNIC address blocks: 42104
APNIC Region origin ASes present in the Internet Routing Table: 4718
APNIC Prefixes per ASN: 21.74
APNIC Region origin ASes announcing only one prefix: 1245
APNIC Region transit ASes present in the Internet Routing Table: 748
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: 252
Number of APNIC addresses announced to Internet: 704455808
Equivalent to 41 /8s, 253 /16s and 36 /24s
Percentage of available APNIC address space announced: 82.3

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: 152843
Total ARIN prefixes after maximum aggregation: 77498
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 153855
Unique aggregates announced from the ARIN address blocks: 68624
ARIN Region origin ASes present in the Internet Routing Table: 15198
ARIN Prefixes per ASN: 10.12
ARIN Region origin ASes announcing only one prefix: 5762
ARIN Region transit ASes present in the Internet Routing Table: 1608
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: 16
Number of ARIN addresses announced to Internet: 1071702912
Equivalent to 63 /8s, 224 /16s and 227 /24s
Percentage of available ARIN address space announced: 56.7

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: 103934
Total RIPE prefixes after maximum aggregation: 55242
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 106099
Unique aggregates announced from the RIPE address blocks: 67322
RIPE Region origin ASes present in the Internet Routing Table: 16682
RIPE Prefixes per ASN: 6.36
RIPE Region origin ASes announcing only one prefix: 8085
RIPE Region transit ASes present in the Internet Routing Table: 2712
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1723
Number of RIPE addresses announced to Internet: 636917124
Equivalent to 37 /8s, 246 /16s and 149 /24s
Percentage of available RIPE address space announced: 92.6

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: 42558
Total LACNIC prefixes after maximum aggregation: 8381
LACNIC Deaggregation factor: 5.08
Prefixes being announced from the LACNIC address blocks: 45207
Unique aggregates announced from the LACNIC address blocks: 21791
LACNIC Region origin ASes present in the Internet Routing Table: 1606
LACNIC Prefixes per ASN: 28.15
LACNIC Region origin ASes announcing only one prefix: 426
LACNIC Region transit ASes present in the Internet Routing Table: 309
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: 617
Number of LACNIC addresses announced to Internet: 112449960
Equivalent to 6 /8s, 179 /16s and 217 /24s
Percentage of available LACNIC address space announced: 67.0

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: 9428
Total AfriNIC prefixes after maximum aggregation: 2169
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 9863
Unique aggregates announced from the AfriNIC address blocks: 3415
AfriNIC Region origin ASes present in the Internet Routing Table: 552
AfriNIC Prefixes per ASN: 17.87
AfriNIC Region origin ASes announcing only one prefix: 173
AfriNIC Region transit ASes present in the Internet Routing Table: 123
Average AfriNIC Region AS path length visible: 4.5
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: 41008384
Equivalent to 2 /8s, 113 /16s and 189 /24s
Percentage of available AfriNIC address space announced: 40.7

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 2739 11122 1242 Korea Telecom (KIX)
17974 2235 563 82 PT TELEKOMUNIKASI INDONESIA
7545 1692 301 88 TPG Internet Pty Ltd
4755 1616 388 163 TATA Communications formerly
9829 1304 1085 28 BSNL National Internet Backbo
9583 1161 88 508 Sify Limited
7552 1127 1062 11 Vietel Corporation
4808 1117 2053 318 CNCGROUP IP network: China169
24560 1037 385 165 Bharti Airtel Ltd., Telemedia
9498 985 291 69 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 3414 998 172 Windstream Communications Inc
6389 3384 3773 189 bellsouth.net, inc.
18566 2088 382 181 Covad Communications
1785 1937 681 131 PaeTec Communications, Inc.
22773 1679 2911 122 Cox Communications, Inc.
20115 1648 1571 615 Charter Communications
4323 1574 1028 382 Time Warner Telecom
30036 1390 270 779 Mediacom Communications Corp
7018 1255 10040 825 AT&T WorldNet Services
7011 1191 316 697 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 1685 544 16 Corbina telecom
2118 1023 97 14 EUnet/RELCOM Autonomous Syste
12479 796 742 93 Uni2 Autonomous System
34984 730 189 174 BILISIM TELEKOM
6830 711 2302 445 UPC Distribution Services
31148 705 37 9 FreeNet ISP
20940 676 218 530 Akamai Technologies European
13188 629 100 11 Educational Network
8551 578 364 61 Bezeq International
3320 499 8443 409 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
28573 2011 1221 55 NET Servicos de Comunicao S.A
10620 2009 348 208 TVCABLE BOGOTA
6503 1522 418 65 AVANTEL, S.A.
8151 1463 3042 343 UniNet S.A. de C.V.
7303 1457 934 196 Telecom Argentina Stet-France
6458 860 81 15 GUATEL
27947 716 73 93 Telconet S.A
11172 643 91 74 Servicios Alestra S.A de C.V
3816 596 250 83 Empresa Nacional de Telecomun
22047 583 326 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 1000 958 13 TEDATA
24863 863 274 32 LINKdotNET AS number
6713 509 650 19 Itissalat Al-MAGHRIB
36998 435 48 3 MOBITEL
24835 286 80 8 RAYA Telecom - Egypt
3741 262 905 223 The Internet Solution
12258 197 28 62 Vodacom Internet Company
29975 191 667 21 Vodacom
16637 169 664 86 MTN Network Solutions
29571 160 15 15 Ci Telecom Autonomous system

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 3414 998 172 Windstream Communications Inc
6389 3384 3773 189 bellsouth.net, inc.
4766 2739 11122 1242 Korea Telecom (KIX)
17974 2235 563 82 PT TELEKOMUNIKASI INDONESIA
18566 2088 382 181 Covad Communications
28573 2011 1221 55 NET Servicos de Comunicao S.A
10620 2009 348 208 TVCABLE BOGOTA
1785 1937 681 131 PaeTec Communications, Inc.
7545 1692 301 88 TPG Internet Pty Ltd
8402 1685 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
6389 3384 3195 bellsouth.net, inc.
17974 2235 2153 PT TELEKOMUNIKASI INDONESIA
28573 2011 1956 NET Servicos de Comunicao S.A
18566 2088 1907 Covad Communications
1785 1937 1806 PaeTec Communications, Inc.
10620 2009 1801 TVCABLE BOGOTA
8402 1685 1669 Corbina telecom
7545 1692 1604 TPG Internet Pty Ltd
22773 1679 1557 Cox Communications, Inc.
4766 2739 1497 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
59407 UNALLOCATED 5.134.16.0/21 51167 Giga-Hosting GmbH
59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o.
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
25639 UNALLOCATED 12.41.169.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.103.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
198.18.0.0/15 14744 Internap Network Services

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
5.150.192.0/18 8473 Bahnhof Autonomous System
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

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 /9:12 /10:28 /11:82 /12:236
/13:471 /14:844 /15:1520 /16:12296 /17:6373 /18:10756
/19:20905 /20:29752 /21:31599 /22:41202 /23:39360 /24:218472
/25:1219 /26:1468 /27:854 /28:166 /29:60 /30:18
/31:0 /32:23

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

ASN No of nets Total ann. Description
7029 2761 3414 Windstream Communications Inc
18566 2038 2088 Covad Communications
6389 1866 3384 bellsouth.net, inc.
8402 1382 1685 Corbina telecom
30036 1325 1390 Mediacom Communications Corp
11492 1154 1191 Cable One
22773 1106 1679 Cox Communications, Inc.
6503 1051 1522 AVANTEL, S.A.
1785 1044 1937 PaeTec Communications, Inc.
7011 930 1191 Citizens Utilities

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

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

1:577 2:761 3:1 4:13 5:146 6:3
8:437 12:2011 13:1 14:639 15:11 16:3
17:5 20:24 23:194 24:1795 27:1337 31:1019
32:56 33:2 34:2 36:8 37:651 38:825
39:1 40:128 41:2853 42:142 44:3 46:1523
47:2 49:432 50:558 52:13 54:14 55:9
56:1 57:31 58:984 59:529 60:244 61:1339
62:920 63:2034 64:4248 65:2244 66:4495 67:2014
68:1157 69:3201 70:987 71:514 72:1871 74:2603
75:489 76:335 77:938 78:933 79:492 80:1226
81:947 82:630 83:535 84:506 85:1148 86:423
87:927 88:346 89:1673 90:303 91:5032 92:573
93:1300 94:1560 95:1250 96:399 97:323 98:884
99:39 100:22 101:258 103:1285 105:416 106:115
107:189 108:376 109:1456 110:785 111:939 112:428
113:645 114:657 115:909 116:923 117:725 118:902
119:1233 120:359 121:797 122:1658 123:1167 124:1377
125:1260 128:552 129:186 130:269 131:635 132:300
133:22 134:246 135:61 136:215 137:241 138:334
139:177 140:495 141:253 142:432 143:373 144:477
145:77 146:512 147:292 148:769 149:320 150:152
151:186 152:473 153:175 154:19 155:434 156:222
157:382 158:190 159:628 160:341 161:274 162:377
163:192 164:673 165:413 166:588 167:533 168:912
169:127 170:898 171:149 172:5 173:1735 174:612
175:436 176:568 177:918 178:1643 180:1311 181:112
182:997 183:232 184:554 186:1986 187:1085 188:1371
189:1573 190:6138 192:6007 193:5541 194:4485 195:3228
196:1208 197:176 198:3687 199:4930 200:5993 201:1959
202:8678 203:8670 204:4394 205:2546 206:2786 207:2823
208:4042 209:3629 210:2785 211:1565 212:1973 213:1822
214:875 215:85 216:5079 217:1569 218:557 219:337
220:1230 221:571 222:336 223:347

End of report
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