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.

Wednesday, September 26, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Thu 27 Sep, 2012

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

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

BGP routing table entries examined: 428193
Prefixes after maximum aggregation: 178566
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 209204
Total ASes present in the Internet Routing Table: 42187
Prefixes per ASN: 10.15
Origin-only ASes present in the Internet Routing Table: 33667
Origin ASes announcing only one prefix: 15773
Transit ASes present in the Internet Routing Table: 5603
Transit-only ASes present in the Internet Routing Table: 141
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: 756
Unregistered ASNs in the Routing Table: 275
Number of 32-bit ASNs allocated by the RIRs: 3325
Number of 32-bit ASNs visible in the Routing Table: 2917
Prefixes from 32-bit ASNs in the Routing Table: 7892
Special use prefixes present in the Routing Table: 11
Prefixes being announced from unallocated address space: 173
Number of addresses announced to Internet: 2599116428
Equivalent to 154 /8s, 235 /16s and 94 /24s
Percentage of available address space announced: 70.2
Percentage of allocated address space announced: 70.2
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.7
Total number of prefixes smaller than registry allocations: 151148

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

Prefixes being announced by APNIC Region ASes: 102869
Total APNIC prefixes after maximum aggregation: 32532
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103540
Unique aggregates announced from the APNIC address blocks: 42742
APNIC Region origin ASes present in the Internet Routing Table: 4759
APNIC Prefixes per ASN: 21.76
APNIC Region origin ASes announcing only one prefix: 1240
APNIC Region transit ASes present in the Internet Routing Table: 768
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: 315
Number of APNIC addresses announced to Internet: 708508416
Equivalent to 42 /8s, 58 /16s and 251 /24s
Percentage of available APNIC address space announced: 82.8

APNIC AS Blocks 4608-4864, 7467-7722, 9216-10239, 17408-18431
(pre-ERX allocations) 23552-24575, 37888-38911, 45056-46079, 55296-56319,
58368-59391, 131072-133119
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: 154404
Total ARIN prefixes after maximum aggregation: 78107
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155317
Unique aggregates announced from the ARIN address blocks: 69165
ARIN Region origin ASes present in the Internet Routing Table: 15248
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5766
ARIN Region transit ASes present in the Internet Routing Table: 1585
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: 17
Number of ARIN addresses announced to Internet: 1084558464
Equivalent to 64 /8s, 165 /16s and 12 /24s
Percentage of available ARIN address space announced: 57.4

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: 109200
Total RIPE prefixes after maximum aggregation: 57145
RIPE Deaggregation factor: 1.91
Prefixes being announced from the RIPE address blocks: 111784
Unique aggregates announced from the RIPE address blocks: 71284
RIPE Region origin ASes present in the Internet Routing Table: 16868
RIPE Prefixes per ASN: 6.63
RIPE Region origin ASes announcing only one prefix: 8145
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: 1896
Number of RIPE addresses announced to Internet: 647037924
Equivalent to 38 /8s, 145 /16s and 3 /24s
Percentage of available RIPE address space announced: 94.1

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: 43876
Total LACNIC prefixes after maximum aggregation: 8499
LACNIC Deaggregation factor: 5.16
Prefixes being announced from the LACNIC address blocks: 47117
Unique aggregates announced from the LACNIC address blocks: 22348
LACNIC Region origin ASes present in the Internet Routing Table: 1656
LACNIC Prefixes per ASN: 28.45
LACNIC Region origin ASes announcing only one prefix: 446
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: 683
Number of LACNIC addresses announced to Internet: 116822824
Equivalent to 6 /8s, 246 /16s and 147 /24s
Percentage of available LACNIC address space announced: 69.6

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: 9828
Total AfriNIC prefixes after maximum aggregation: 2226
AfriNIC Deaggregation factor: 4.42
Prefixes being announced from the AfriNIC address blocks: 10262
Unique aggregates announced from the AfriNIC address blocks: 3514
AfriNIC Region origin ASes present in the Internet Routing Table: 565
AfriNIC Prefixes per ASN: 18.16
AfriNIC Region origin ASes announcing only one prefix: 176
AfriNIC Region transit ASes present in the Internet Routing Table: 128
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: 41868544
Equivalent to 2 /8s, 126 /16s and 221 /24s
Percentage of available AfriNIC address space announced: 41.6

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 2978 11429 902 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1762 301 87 TPG Internet Pty Ltd
4755 1622 387 162 TATA Communications formerly
9829 1336 1106 41 BSNL National Internet Backbo
9583 1184 88 516 Sify Limited
7552 1142 1062 11 Vietel Corporation
4808 1119 2044 316 CNCGROUP IP network: China169
24560 1041 386 160 Bharti Airtel Ltd., Telemedia
18101 1016 135 169 Reliance Infocom Ltd Internet

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 3303 3732 182 bellsouth.net, inc.
7029 3164 990 161 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1917 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
20115 1661 1580 614 Charter Communications
4323 1577 1153 387 Time Warner Telecom
30036 1388 275 731 Mediacom Communications Corp
7018 1252 10319 832 AT&T WorldNet Services
7011 1204 329 698 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 1739 544 16 Corbina telecom
2118 1399 97 14 EUnet/RELCOM Autonomous Syste
15557 1237 2247 55 LDCOM NETWORKS
12479 846 775 74 Uni2 Autonomous System
34984 772 206 181 BILISIM TELEKOM
6830 724 2313 448 UPC Distribution Services
31148 709 37 9 FreeNet ISP
20940 699 222 542 Akamai Technologies European
13188 694 92 153 Educational Network
58113 631 70 366 LIR DATACENTER TELECOM SRL

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 2187 376 220 TVCABLE BOGOTA
28573 2103 1251 56 NET Servicos de Comunicao S.A
8151 1590 3045 347 UniNet S.A. de C.V.
7303 1561 1034 199 Telecom Argentina Stet-France
6503 1536 435 68 AVANTEL, S.A.
27947 724 74 91 Telconet S.A
3816 642 309 53 Empresa Nacional de Telecomun
6458 632 81 15 GUATEL
11172 592 85 69 Servicios Alestra S.A de C.V
14420 587 86 101 CORPORACION NACIONAL DE TELEC

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 888 275 36 LINKdotNET AS number
8452 783 958 13 TEDATA
36998 772 48 3 MOBITEL
6713 517 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 264 904 224 The Internet Solution
33776 226 12 13 Starcomms Nigeria Limited
12258 194 28 66 Vodacom Internet Company
15706 192 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom

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 3303 3732 182 bellsouth.net, inc.
7029 3164 990 161 Windstream Communications Inc
4766 2978 11429 902 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2187 376 220 TVCABLE BOGOTA
28573 2103 1251 56 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1917 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
7545 1762 301 87 TPG Internet Pty Ltd

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 3164 3003 Windstream Communications Inc
17974 2355 2301 PT TELEKOMUNIKASI INDONESIA
4766 2978 2076 Korea Telecom (KIX)
28573 2103 2047 NET Servicos de Comunicao S.A
10620 2187 1967 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1917 1789 PaeTec Communications, Inc.
22773 1887 1759 Cox Communications, Inc.
8402 1739 1723 Corbina telecom
7545 1762 1675 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
128.0.80.0/20 52041 Timer LTD
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/21 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition
128.0.168.0/21 15772 W-NET Kiev
128.0.170.0/24 24685 ISP Elencom autonomous system
128.0.176.0/20 30764 PODA s.r.o.

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 /11:86 /12:240
/13:477 /14:846 /15:1544 /16:12395 /17:6459 /18:10830
/19:21092 /20:30319 /21:32293 /22:42674 /23:40009 /24:224588
/25:1394 /26:1676 /27:924 /28:179 /29:65 /30:18
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2647 3164 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1840 3303 bellsouth.net, inc.
8402 1450 1739 Corbina telecom
30036 1322 1388 Mediacom Communications Corp
22773 1229 1887 Cox Communications, Inc.
15557 1175 1237 LDCOM NETWORKS
11492 1161 1198 Cable One
6503 1054 1536 AVANTEL, S.A.
1785 1016 1917 PaeTec Communications, Inc.

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

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

1:613 2:681 3:1 4:13 5:529 6:3
8:464 12:1989 13:1 14:665 15:11 16:3
17:6 20:27 23:203 24:1788 27:1336 31:1015
32:54 33:2 34:2 36:7 37:808 38:828
39:2 40:133 41:3070 42:158 44:3 46:1599
47:2 49:481 50:598 52:13 54:21 55:8
56:1 57:27 58:993 59:542 60:238 61:1291
62:981 63:1983 64:4265 65:2241 66:4501 67:2054
68:1167 69:3235 70:986 71:511 72:1873 74:2629
75:485 76:314 77:966 78:955 79:493 80:1269
81:971 82:633 83:530 84:626 85:1158 86:821
87:926 88:363 89:1826 90:303 91:5219 92:598
93:1561 94:1625 95:1220 96:418 97:322 98:979
99:39 100:23 101:262 103:1553 105:512 106:118
107:198 108:463 109:1950 110:807 111:968 112:447
113:708 114:625 115:876 116:880 117:734 118:957
119:1236 120:307 121:691 122:1631 123:1164 124:1328
125:1273 128:563 129:185 130:282 131:632 132:310
133:22 134:251 135:61 136:216 137:239 138:336
139:171 140:494 141:281 142:485 143:346 144:473
145:81 146:516 147:263 148:748 149:325 150:155
151:194 152:450 153:178 154:20 155:420 156:224
157:373 158:258 159:658 160:342 161:411 162:363
163:191 164:692 165:422 166:529 167:553 168:967
169:126 170:908 171:165 172:6 173:1689 174:622
175:443 176:788 177:1249 178:1608 180:1367 181:137
182:1051 183:295 184:605 185:6 186:2201 187:1265
188:1696 189:1577 190:6021 192:6030 193:5721 194:4563
195:3497 196:1216 197:192 198:3815 199:5029 200:6025
201:1981 202:8747 203:8735 204:4425 205:2541 206:2760
207:2853 208:4065 209:3658 210:2852 211:1533 212:1987
213:1815 214:884 215:86 216:5126 217:1544 218:572
219:315 220:1251 221:536 222:337 223:406

End of report
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