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, May 17, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 18 May, 2012

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

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

BGP routing table entries examined: 408476
Prefixes after maximum aggregation: 173887
Deaggregation factor: 2.35
Unique aggregates announced to Internet: 199418
Total ASes present in the Internet Routing Table: 41025
Prefixes per ASN: 9.96
Origin-only ASes present in the Internet Routing Table: 33201
Origin ASes announcing only one prefix: 15656
Transit ASes present in the Internet Routing Table: 5477
Transit-only ASes present in the Internet Routing Table: 138
Average AS path length visible in the Internet Routing Table: 4.5
Max AS path length visible: 64
Max AS path prepend of ASN ( 9902) 56
Prefixes from unregistered ASNs in the Routing Table: 373
Unregistered ASNs in the Routing Table: 132
Number of 32-bit ASNs allocated by the RIRs: 2705
Number of 32-bit ASNs visible in the Routing Table: 2347
Prefixes from 32-bit ASNs in the Routing Table: 5949
Special use prefixes present in the Routing Table: 2
Prefixes being announced from unallocated address space: 108
Number of addresses announced to Internet: 2549508656
Equivalent to 151 /8s, 246 /16s and 106 /24s
Percentage of available address space announced: 68.8
Percentage of allocated address space announced: 68.9
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 92.6
Total number of prefixes smaller than registry allocations: 174791

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

Prefixes being announced by APNIC Region ASes: 100044
Total APNIC prefixes after maximum aggregation: 32439
APNIC Deaggregation factor: 3.08
Prefixes being announced from the APNIC address blocks: 96492
Unique aggregates announced from the APNIC address blocks: 39944
APNIC Region origin ASes present in the Internet Routing Table: 4691
APNIC Prefixes per ASN: 20.57
APNIC Region origin ASes announcing only one prefix: 1241
APNIC Region transit ASes present in the Internet Routing Table: 728
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 22
Number of APNIC region 32-bit ASNs visible in the Routing Table: 212
Number of APNIC addresses announced to Internet: 644806336
Equivalent to 38 /8s, 110 /16s and 246 /24s
Percentage of available APNIC address space announced: 81.8

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-132095, 132096-133119
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, 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: 151144
Total ARIN prefixes after maximum aggregation: 76717
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 121800
Unique aggregates announced from the ARIN address blocks: 50927
ARIN Region origin ASes present in the Internet Routing Table: 15109
ARIN Prefixes per ASN: 8.06
ARIN Region origin ASes announcing only one prefix: 5746
ARIN Region transit ASes present in the Internet Routing Table: 1597
Average ARIN Region AS path length visible: 4.0
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: 812245696
Equivalent to 48 /8s, 105 /16s and 226 /24s
Percentage of available ARIN address space announced: 64.8

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, 173/8,
174/8, 184/8, 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: 100545
Total RIPE prefixes after maximum aggregation: 54228
RIPE Deaggregation factor: 1.85
Prefixes being announced from the RIPE address blocks: 92716
Unique aggregates announced from the RIPE address blocks: 58860
RIPE Region origin ASes present in the Internet Routing Table: 16567
RIPE Prefixes per ASN: 5.60
RIPE Region origin ASes announcing only one prefix: 8059
RIPE Region transit ASes present in the Internet Routing Table: 2642
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: 1560
Number of RIPE addresses announced to Internet: 513299080
Equivalent to 30 /8s, 152 /16s and 82 /24s
Percentage of available RIPE address space announced: 82.7

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
196608-198655
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,
176/8, 178/8, 185/8, 193/8, 194/8, 195/8, 212/8,
213/8, 217/8,

LACNIC Region Analysis Summary
------------------------------

Prefixes being announced by LACNIC Region ASes: 41375
Total LACNIC prefixes after maximum aggregation: 8276
LACNIC Deaggregation factor: 5.00
Prefixes being announced from the LACNIC address blocks: 41403
Unique aggregates announced from the LACNIC address blocks: 20405
LACNIC Region origin ASes present in the Internet Routing Table: 1596
LACNIC Prefixes per ASN: 25.94
LACNIC Region origin ASes announcing only one prefix: 441
LACNIC Region transit ASes present in the Internet Routing Table: 297
Average LACNIC Region AS path length visible: 4.4
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 554
Number of LACNIC addresses announced to Internet: 100678792
Equivalent to 6 /8s, 0 /16s and 60 /24s
Percentage of available LACNIC address space announced: 66.7

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,
200/8, 201/8,

AfriNIC Region Analysis Summary
-------------------------------

Prefixes being announced by AfriNIC Region ASes: 9237
Total AfriNIC prefixes after maximum aggregation: 2163
AfriNIC Deaggregation factor: 4.27
Prefixes being announced from the AfriNIC address blocks: 7253
Unique aggregates announced from the AfriNIC address blocks: 2225
AfriNIC Region origin ASes present in the Internet Routing Table: 541
AfriNIC Prefixes per ASN: 13.41
AfriNIC Region origin ASes announcing only one prefix: 169
AfriNIC Region transit ASes present in the Internet Routing Table: 121
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: 5
Number of AfriNIC addresses announced to Internet: 31830528
Equivalent to 1 /8s, 229 /16s and 178 /24s
Percentage of available AfriNIC address space announced: 47.4

AfriNIC AS Blocks 36864-37887, 327680-328703 & ERX transfers
AfriNIC Address Blocks 41/8, 102/8, 105/8, 197/8,

APNIC Region per AS prefix count summary
----------------------------------------

ASN No of nets /20 equiv MaxAgg Description
4766 2598 11113 1101 Korea Telecom (KIX)
17974 1922 530 80 PT TELEKOMUNIKASI INDONESIA
7545 1679 301 86 TPG Internet Pty Ltd
4755 1576 385 155 TATA Communications formerly
9829 1201 1084 28 BSNL National Internet Backbo
7552 1176 1062 11 Vietel Corporation
9583 1157 87 500 Sify Limited
4808 1109 2051 318 CNCGROUP IP network: China169
24560 1027 385 167 Bharti Airtel Ltd., Telemedia
9498 965 291 64 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 3414 3807 193 bellsouth.net, inc.
7029 3349 985 158 Windstream Communications Inc
18566 2093 382 179 Covad Communications
1785 1905 681 131 PaeTec Communications, Inc.
20115 1637 1566 619 Charter Communications
22773 1607 2911 121 Cox Communications, Inc.
4323 1584 1042 383 Time Warner Telecom
30036 1417 263 754 Mediacom Communications Corp
7018 1220 10022 818 AT&T WorldNet Services
11492 1186 216 364 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 1668 544 16 Corbina telecom
34984 695 188 172 BILISIM TELEKOM
31148 685 37 9 FreeNet ISP
12479 680 671 69 Uni2 Autonomous System
20940 656 216 510 Akamai Technologies European
6830 655 2215 426 UPC Distribution Services
8551 567 360 80 Bezeq International
3320 486 8442 402 Deutsche Telekom AG
3292 472 2108 407 TDC Tele Danmark
8866 436 134 27 Bulgarian Telecommunication C

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 1902 338 181 TVCABLE BOGOTA
28573 1863 1153 59 NET Servicos de Comunicao S.A
6503 1526 418 65 AVANTEL, S.A.
8151 1479 3011 340 UniNet S.A. de C.V.
7303 1371 837 188 Telecom Argentina Stet-France
26615 903 761 33 Tim Brasil S.A.
27947 690 73 95 Telconet S.A
11172 642 91 73 Servicios Alestra S.A de C.V
22047 582 326 15 VTR PUNTO NET S.A.
3816 579 244 99 Empresa Nacional de Telecomun

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 1309 957 12 TEDATA
24863 845 274 35 LINKdotNET AS number
6713 497 649 18 Itissalat Al-MAGHRIB
3741 262 905 223 The Internet Solution
33776 203 12 21 Starcomms Nigeria Limited
12258 197 28 62 Vodacom Internet Company
15399 195 29 14 Wananchi Online Limited
24835 179 80 8 RAYA Telecom - Egypt
16637 170 666 82 MTN Network Solutions
15706 164 32 6 Sudatel Internet Exchange Aut

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 3414 3807 193 bellsouth.net, inc.
7029 3349 985 158 Windstream Communications Inc
4766 2598 11113 1101 Korea Telecom (KIX)
18566 2093 382 179 Covad Communications
17974 1922 530 80 PT TELEKOMUNIKASI INDONESIA
1785 1905 681 131 PaeTec Communications, Inc.
10620 1902 338 181 TVCABLE BOGOTA
28573 1863 1153 59 NET Servicos de Comunicao S.A
7545 1679 301 86 TPG Internet Pty Ltd
8402 1668 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 3349 3191 Windstream Communications Inc
18566 2093 1914 Covad Communications
17974 1922 1842 PT TELEKOMUNIKASI INDONESIA
28573 1863 1804 NET Servicos de Comunicao S.A
1785 1905 1774 PaeTec Communications, Inc.
10620 1902 1721 TVCABLE BOGOTA
8402 1668 1652 Corbina telecom
7545 1679 1593 TPG Internet Pty Ltd
4766 2598 1497 Korea Telecom (KIX)
22773 1607 1486 Cox 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
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
32873 UNALLOCATED 12.46.100.0/23 10912 InterNAP Network Ser
32873 UNALLOCATED 12.46.102.0/24 10912 InterNAP Network Ser
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
128.0.0.0/21 12654 RIPE NCC RIS Project
128.0.24.0/24 12654 RIPE NCC RIS Project

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

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

Network Origin AS Description
5.42.0.0/17 39493 KolomnaSviazTV AS Number
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 /10:29 /11:81 /12:235
/13:460 /14:832 /15:1495 /16:12254 /17:6259 /18:10582
/19:20695 /20:29283 /21:30634 /22:40167 /23:38379 /24:213317
/25:1215 /26:1449 /27:807 /28:167 /29:68 /30:17
/31:0 /32:20

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

ASN No of nets Total ann. Description
7029 3008 3349 Windstream Communications Inc
6389 2133 3414 bellsouth.net, inc.
18566 2042 2093 Covad Communications
10620 1731 1902 TVCABLE BOGOTA
8402 1646 1668 Corbina telecom
30036 1358 1417 Mediacom Communications Corp
6503 1284 1526 AVANTEL, S.A.
11492 1149 1186 Cable One
8452 1111 1309 TEDATA
7011 1070 1185 Citizens Utilities

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

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

1:542 2:714 4:14 5:10 6:3 8:414
12:2005 13:1 14:609 15:12 16:3 17:5
20:23 23:171 24:1771 27:1292 31:958 32:57
33:2 34:2 36:8 37:473 38:808 40:121
41:3241 42:136 44:3 46:1424 47:3 49:410
50:549 52:13 54:10 55:10 56:3 57:33
58:957 59:483 60:253 61:1224 62:992 63:2051
64:4181 65:2248 66:4473 67:2010 68:1167 69:3203
70:906 71:489 72:1823 74:2602 75:492 76:325
77:939 78:970 79:488 80:1209 81:910 82:665
83:553 84:486 85:1222 86:437 87:917 88:333
89:1705 90:291 91:4840 92:545 93:1321 94:1527
95:1171 96:362 97:316 98:876 99:38 100:7
101:190 103:1076 106:103 107:187 108:292 109:1328
110:766 111:915 112:410 113:601 114:628 115:832
116:931 117:715 118:909 119:1225 120:355 121:694
122:1666 123:1103 124:1384 125:1254 128:548 129:196
130:252 131:631 132:178 133:22 134:249 135:62
136:214 137:180 138:359 139:184 140:493 141:244
142:414 143:568 144:526 145:70 146:504 147:295
148:769 149:304 150:191 151:176 152:469 153:172
154:12 155:403 156:222 157:382 158:183 159:551
160:339 161:263 162:344 163:189 164:587 165:383
166:569 167:469 168:862 169:126 170:867 171:131
172:4 173:1741 174:576 175:430 176:586 177:751
178:1370 180:1215 181:83 182:1001 183:295 184:496
185:1 186:2295 187:1078 188:1271 189:1796 190:5514
192:5998 193:5300 194:3803 195:3221 196:1288 197:142
198:3657 199:4629 200:5811 201:1936 202:8574 203:8599
204:4335 205:2537 206:2769 207:2799 208:4063 209:3622
210:2748 211:1517 212:2023 213:1939 214:875 215:104
216:5090 217:1543 218:543 219:315 220:1239 221:558
222:324 223:337

End of report
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