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.

Saturday, July 28, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Sun 29 Jul, 2012

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

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

BGP routing table entries examined: 419131
Prefixes after maximum aggregation: 176637
Deaggregation factor: 2.37
Unique aggregates announced to Internet: 204572
Total ASes present in the Internet Routing Table: 41632
Prefixes per ASN: 10.07
Origin-only ASes present in the Internet Routing Table: 33372
Origin ASes announcing only one prefix: 15702
Transit ASes present in the Internet Routing Table: 5596
Transit-only ASes present in the Internet Routing Table: 135
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 32
Max AS path prepend of ASN ( 48687) 24
Prefixes from unregistered ASNs in the Routing Table: 383
Unregistered ASNs in the Routing Table: 147
Number of 32-bit ASNs allocated by the RIRs: 3048
Number of 32-bit ASNs visible in the Routing Table: 2664
Prefixes from 32-bit ASNs in the Routing Table: 6891
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 167
Number of addresses announced to Internet: 2571450540
Equivalent to 153 /8s, 69 /16s and 56 /24s
Percentage of available address space announced: 69.4
Percentage of allocated address space announced: 69.5
Percentage of available address space allocated: 99.9
Percentage of address space in use by end-sites: 93.1
Total number of prefixes smaller than registry allocations: 146077

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

Prefixes being announced by APNIC Region ASes: 102587
Total APNIC prefixes after maximum aggregation: 32797
APNIC Deaggregation factor: 3.13
Prefixes being announced from the APNIC address blocks: 103075
Unique aggregates announced from the APNIC address blocks: 42312
APNIC Region origin ASes present in the Internet Routing Table: 4723
APNIC Prefixes per ASN: 21.82
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 755
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: 261
Number of APNIC addresses announced to Internet: 705913984
Equivalent to 42 /8s, 19 /16s and 100 /24s
Percentage of available APNIC address space announced: 82.5

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: 153041
Total ARIN prefixes after maximum aggregation: 77738
ARIN Deaggregation factor: 1.97
Prefixes being announced from the ARIN address blocks: 154103
Unique aggregates announced from the ARIN address blocks: 68817
ARIN Region origin ASes present in the Internet Routing Table: 15210
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5779
ARIN Region transit ASes present in the Internet Routing Table: 1604
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: 1072568704
Equivalent to 63 /8s, 238 /16s and 25 /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: 104094
Total RIPE prefixes after maximum aggregation: 55501
RIPE Deaggregation factor: 1.88
Prefixes being announced from the RIPE address blocks: 106290
Unique aggregates announced from the RIPE address blocks: 67987
RIPE Region origin ASes present in the Internet Routing Table: 16708
RIPE Prefixes per ASN: 6.36
RIPE Region origin ASes announcing only one prefix: 8096
RIPE Region transit ASes present in the Internet Routing Table: 2711
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 32
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1749
Number of RIPE addresses announced to Internet: 637716484
Equivalent to 38 /8s, 2 /16s and 200 /24s
Percentage of available RIPE address space announced: 92.7

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
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: 42886
Total LACNIC prefixes after maximum aggregation: 8372
LACNIC Deaggregation factor: 5.12
Prefixes being announced from the LACNIC address blocks: 45594
Unique aggregates announced from the LACNIC address blocks: 21915
LACNIC Region origin ASes present in the Internet Routing Table: 1609
LACNIC Prefixes per ASN: 28.34
LACNIC Region origin ASes announcing only one prefix: 422
LACNIC Region transit ASes present in the Internet Routing Table: 312
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: 632
Number of LACNIC addresses announced to Internet: 112541608
Equivalent to 6 /8s, 181 /16s and 63 /24s
Percentage of available LACNIC address space announced: 67.1

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: 9471
Total AfriNIC prefixes after maximum aggregation: 2175
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 9902
Unique aggregates announced from the AfriNIC address blocks: 3395
AfriNIC Region origin ASes present in the Internet Routing Table: 550
AfriNIC Prefixes per ASN: 18.00
AfriNIC Region origin ASes announcing only one prefix: 165
AfriNIC Region transit ASes present in the Internet Routing Table: 120
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: 41351936
Equivalent to 2 /8s, 118 /16s and 251 /24s
Percentage of available AfriNIC address space announced: 41.1

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 2759 11123 1252 Korea Telecom (KIX)
17974 2274 569 90 PT TELEKOMUNIKASI INDONESIA
7545 1705 301 88 TPG Internet Pty Ltd
4755 1616 388 163 TATA Communications formerly
9829 1308 1084 31 BSNL National Internet Backbo
9583 1160 87 508 Sify Limited
7552 1125 1062 11 Vietel Corporation
4808 1117 2052 317 CNCGROUP IP network: China169
24560 1038 385 165 Bharti Airtel Ltd., Telemedia
9498 991 294 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
7029 3412 986 155 Windstream Communications Inc
6389 3382 3773 191 bellsouth.net, inc.
18566 2088 382 181 Covad Communications
1785 1939 681 130 PaeTec Communications, Inc.
22773 1698 2914 125 Cox Communications, Inc.
20115 1647 1570 611 Charter Communications
4323 1574 1027 382 Time Warner Telecom
30036 1408 275 791 Mediacom Communications Corp
7018 1255 10040 822 AT&T WorldNet Services
11492 1192 217 350 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 1553 544 16 Corbina telecom
12479 808 749 92 Uni2 Autonomous System
34984 735 189 177 BILISIM TELEKOM
6830 715 2310 446 UPC Distribution Services
20940 707 228 554 Akamai Technologies European
31148 706 37 9 FreeNet ISP
2118 632 97 14 EUnet/RELCOM Autonomous Syste
13188 613 100 9 Educational Network
8551 579 364 61 Bezeq International
3320 502 8443 411 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 2044 1226 58 NET Servicos de Comunicao S.A
10620 2030 349 213 TVCABLE BOGOTA
6503 1526 419 67 AVANTEL, S.A.
8151 1469 3071 349 UniNet S.A. de C.V.
7303 1458 934 196 Telecom Argentina Stet-France
6458 882 81 15 GUATEL
27947 719 74 95 Telconet S.A
11172 644 91 74 Servicios Alestra S.A de C.V
3816 594 248 87 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 1031 958 13 TEDATA
24863 861 274 32 LINKdotNET AS number
6713 509 650 19 Itissalat Al-MAGHRIB
36998 483 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 170 680 87 MTN Network Solutions
15706 160 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
7029 3412 986 155 Windstream Communications Inc
6389 3382 3773 191 bellsouth.net, inc.
4766 2759 11123 1252 Korea Telecom (KIX)
17974 2274 569 90 PT TELEKOMUNIKASI INDONESIA
18566 2088 382 181 Covad Communications
28573 2044 1226 58 NET Servicos de Comunicao S.A
10620 2030 349 213 TVCABLE BOGOTA
1785 1939 681 130 PaeTec Communications, Inc.
7545 1705 301 88 TPG Internet Pty Ltd
22773 1698 2914 125 Cox Communications, Inc.

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 3382 3191 bellsouth.net, inc.
17974 2274 2184 PT TELEKOMUNIKASI INDONESIA
28573 2044 1986 NET Servicos de Comunicao S.A
18566 2088 1907 Covad Communications
10620 2030 1817 TVCABLE BOGOTA
1785 1939 1809 PaeTec Communications, Inc.
7545 1705 1617 TPG Internet Pty Ltd
22773 1698 1573 Cox Communications, Inc.
8402 1553 1537 Corbina telecom
4766 2759 1507 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 5.149.64.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.64.0/19 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.65.0/24 35567 DASTO semtel d.o.o.
59457 UNALLOCATED 5.149.66.0/24 35567 DASTO semtel d.o.o.
59473 UNALLOCATED 5.149.152.0/22 44843 AmsterdamTelecom Ltd
59473 UNALLOCATED 5.149.156.0/23 44843 AmsterdamTelecom Ltd
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

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
5.159.40.0/21 23456 32-bit ASN transition
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
/13:475 /14:848 /15:1528 /16:12308 /17:6367 /18:10759
/19:20938 /20:29903 /21:31763 /22:41441 /23:39676 /24:218940
/25:1215 /26:1477 /27:852 /28:162 /29:60 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2773 3412 Windstream Communications Inc
18566 2038 2088 Covad Communications
6389 1864 3382 bellsouth.net, inc.
30036 1343 1408 Mediacom Communications Corp
8402 1250 1553 Corbina telecom
11492 1155 1192 Cable One
22773 1122 1698 Cox Communications, Inc.
6503 1051 1526 AVANTEL, S.A.
1785 1048 1939 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)
----------------------------------------------

1:563 2:649 3:1 4:13 5:271 6:3
8:440 12:2005 13:1 14:634 15:11 16:3
17:6 20:24 23:201 24:1796 27:1320 31:1019
32:56 33:2 34:2 36:8 37:675 38:824
39:1 40:134 41:2831 42:158 44:3 46:1553
47:2 49:429 50:570 52:13 54:14 55:7
56:1 57:31 58:982 59:532 60:237 61:1342
62:928 63:2030 64:4242 65:2243 66:4512 67:2017
68:1155 69:3201 70:987 71:520 72:1871 74:2605
75:489 76:334 77:937 78:935 79:490 80:1233
81:948 82:642 83:539 84:512 85:1162 86:453
87:931 88:346 89:1759 90:303 91:5062 92:587
93:1306 94:1565 95:1229 96:400 97:315 98:893
99:39 100:21 101:257 103:1323 105:464 106:115
107:189 108:406 109:1459 110:792 111:944 112:431
113:682 114:667 115:908 116:924 117:737 118:944
119:1233 120:357 121:806 122:1680 123:1156 124:1380
125:1260 128:537 129:185 130:265 131:640 132:297
133:22 134:246 135:61 136:215 137:240 138:342
139:184 140:495 141:253 142:437 143:372 144:495
145:78 146:505 147:292 148:766 149:319 150:150
151:185 152:473 153:176 154:19 155:402 156:222
157:381 158:190 159:626 160:344 161:290 162:383
163:189 164:673 165:407 166:585 167:536 168:956
169:127 170:898 171:147 172:5 173:1735 174:610
175:435 176:574 177:999 178:1652 180:1319 181:113
182:1045 183:207 184:559 186:2033 187:1095 188:1378
189:1587 190:6155 192:6021 193:5433 194:4195 195:3202
196:1202 197:184 198:3680 199:4937 200:5981 201:1981
202:8733 203:8674 204:4389 205:2532 206:2794 207:2829
208:4051 209:3634 210:2772 211:1565 212:2034 213:1805
214:868 215:86 216:5078 217:1565 218:562 219:338
220:1231 221:572 222:334 223:350

End of report
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