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.

Sunday, October 28, 2012

[bgp-stats] Routing Table Report - Japan view

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

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

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

BGP routing table entries examined: 429785
Prefixes after maximum aggregation: 179488
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 211326
Total ASes present in the Internet Routing Table: 42468
Prefixes per ASN: 10.12
Origin-only ASes present in the Internet Routing Table: 33764
Origin ASes announcing only one prefix: 15811
Transit ASes present in the Internet Routing Table: 5655
Transit-only ASes present in the Internet Routing Table: 137
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 40
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 873
Unregistered ASNs in the Routing Table: 323
Number of 32-bit ASNs allocated by the RIRs: 3418
Number of 32-bit ASNs visible in the Routing Table: 3049
Prefixes from 32-bit ASNs in the Routing Table: 8302
Special use prefixes present in the Routing Table: 13
Prefixes being announced from unallocated address space: 156
Number of addresses announced to Internet: 2609046380
Equivalent to 155 /8s, 130 /16s and 227 /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: 151065

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

Prefixes being announced by APNIC Region ASes: 103709
Total APNIC prefixes after maximum aggregation: 32591
APNIC Deaggregation factor: 3.18
Prefixes being announced from the APNIC address blocks: 104482
Unique aggregates announced from the APNIC address blocks: 42973
APNIC Region origin ASes present in the Internet Routing Table: 4788
APNIC Prefixes per ASN: 21.82
APNIC Region origin ASes announcing only one prefix: 1249
APNIC Region transit ASes present in the Internet Routing Table: 780
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: 342
Number of APNIC addresses announced to Internet: 712383264
Equivalent to 42 /8s, 118 /16s and 27 /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: 154962
Total ARIN prefixes after maximum aggregation: 78333
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155824
Unique aggregates announced from the ARIN address blocks: 69687
ARIN Region origin ASes present in the Internet Routing Table: 15292
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5787
ARIN Region transit ASes present in the Internet Routing Table: 1602
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1087336320
Equivalent to 64 /8s, 207 /16s and 111 /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: 108918
Total RIPE prefixes after maximum aggregation: 57530
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 111596
Unique aggregates announced from the RIPE address blocks: 72136
RIPE Region origin ASes present in the Internet Routing Table: 16915
RIPE Prefixes per ASN: 6.60
RIPE Region origin ASes announcing only one prefix: 8132
RIPE Region transit ASes present in the Internet Routing Table: 2742
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: 1983
Number of RIPE addresses announced to Internet: 648278820
Equivalent to 38 /8s, 163 /16s and 243 /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: 44112
Total LACNIC prefixes after maximum aggregation: 8744
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 47572
Unique aggregates announced from the LACNIC address blocks: 22917
LACNIC Region origin ASes present in the Internet Routing Table: 1690
LACNIC Prefixes per ASN: 28.15
LACNIC Region origin ASes announcing only one prefix: 473
LACNIC Region transit ASes present in the Internet Routing Table: 319
Average LACNIC Region AS path length visible: 4.6
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 702
Number of LACNIC addresses announced to Internet: 118401192
Equivalent to 7 /8s, 14 /16s and 168 /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: 9666
Total AfriNIC prefixes after maximum aggregation: 2236
AfriNIC Deaggregation factor: 4.32
Prefixes being announced from the AfriNIC address blocks: 10155
Unique aggregates announced from the AfriNIC address blocks: 3476
AfriNIC Region origin ASes present in the Internet Routing Table: 564
AfriNIC Prefixes per ASN: 18.01
AfriNIC Region origin ASes announcing only one prefix: 170
AfriNIC Region transit ASes present in the Internet Routing Table: 124
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: 42356224
Equivalent to 2 /8s, 134 /16s and 78 /24s
Percentage of available AfriNIC address space announced: 42.1

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 2972 11558 900 Korea Telecom (KIX)
17974 2418 829 55 PT TELEKOMUNIKASI INDONESIA
7545 1784 301 85 TPG Internet Pty Ltd
4755 1617 376 159 TATA Communications formerly
9829 1409 1154 41 BSNL National Internet Backbo
9583 1191 88 509 Sify Limited
4808 1113 2056 314 CNCGROUP IP network: China169
7552 1106 1062 11 Vietel Corporation
24560 1035 385 162 Bharti Airtel Ltd., Telemedia
9498 1028 310 74 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 3178 3724 164 bellsouth.net, inc.
7029 3132 989 161 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1928 678 126 PaeTec Communications, Inc.
22773 1911 2931 128 Cox Communications, Inc.
20115 1665 1583 628 Charter Communications
4323 1593 1155 394 Time Warner Telecom
30036 1373 274 726 Mediacom Communications Corp
7018 1276 10290 849 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 1850 544 16 Corbina telecom
12479 853 776 64 Uni2 Autonomous System
34984 822 207 198 BILISIM TELEKOM
31148 726 37 9 FreeNet ISP
6830 724 2314 446 UPC Distribution Services
13188 708 93 135 Educational Network
20940 699 223 548 Akamai Technologies European
2118 664 97 14 EUnet/RELCOM Autonomous Syste
58113 601 66 364 LIR DATACENTER TELECOM SRL
8551 596 364 61 Bezeq International

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 2232 380 225 TVCABLE BOGOTA
28573 2152 1278 61 NET Servicos de Comunicao S.A
7303 1661 1131 201 Telecom Argentina Stet-France
8151 1587 3030 356 UniNet S.A. de C.V.
6503 1539 435 68 AVANTEL, S.A.
27947 654 73 85 Telconet S.A
3816 653 309 69 Empresa Nacional de Telecomun
14420 593 89 103 CORPORACION NACIONAL DE TELEC
11172 589 85 65 Servicios Alestra S.A de C.V
7738 585 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 899 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 651 958 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 3178 3724 164 bellsouth.net, inc.
7029 3132 989 161 Windstream Communications Inc
4766 2972 11558 900 Korea Telecom (KIX)
17974 2418 829 55 PT TELEKOMUNIKASI INDONESIA
10620 2232 380 225 TVCABLE BOGOTA
28573 2152 1278 61 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1928 678 126 PaeTec Communications, Inc.
22773 1911 2931 128 Cox Communications, Inc.
8402 1850 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 2971 Windstream Communications Inc
17974 2418 2363 PT TELEKOMUNIKASI INDONESIA
28573 2152 2091 NET Servicos de Comunicao S.A
4766 2972 2072 Korea Telecom (KIX)
10620 2232 2007 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
8402 1850 1834 Corbina telecom
1785 1928 1802 PaeTec Communications, Inc.
22773 1911 1783 Cox Communications, Inc.
7545 1784 1699 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
61408 UNALLOCATED 5.56.0.0/22 174 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
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<
128.0.160.0/21 23456 32-bit ASN transition
128.0.168.0/21 15772 W-NET Kiev

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 /12:241
/13:478 /14:850 /15:1548 /16:12460 /17:6518 /18:10855
/19:21229 /20:30558 /21:32563 /22:43116 /23:40256 /24:224710
/25:1356 /26:1693 /27:908 /28:177 /29:79 /30:17
/31:0 /32:25

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

ASN No of nets Total ann. Description
7029 2622 3132 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1791 3178 bellsouth.net, inc.
8402 1550 1850 Corbina telecom
30036 1294 1373 Mediacom Communications Corp
22773 1251 1911 Cox Communications, Inc.
11492 1149 1184 Cable One
6503 1054 1539 AVANTEL, S.A.
1785 1018 1928 PaeTec Communications, Inc.
7011 957 1222 Citizens Utilities

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

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

1:645 2:785 3:1 4:13 5:583 6:3
8:479 12:1976 13:3 14:678 15:11 16:3
17:6 20:27 23:211 24:1790 27:1367 31:1031
32:54 33:2 34:2 36:7 37:918 38:845
39:2 40:136 41:2776 42:175 44:3 46:1638
47:2 49:461 50:607 52:12 54:26 55:6
56:4 57:27 58:986 59:548 60:237 61:1301
62:971 63:2002 64:4282 65:2226 66:4530 67:2116
68:1159 69:3242 70:986 71:506 72:1882 74:2615
75:478 76:308 77:973 78:1008 79:509 80:1236
81:981 82:623 83:542 84:525 85:1153 86:481
87:942 88:360 89:1803 90:303 91:5285 92:588
93:1448 94:1676 95:1265 96:408 97:325 98:970
99:39 100:30 101:291 103:1706 105:512 106:122
107:201 108:473 109:1614 110:811 111:976 112:436
113:734 114:631 115:869 116:886 117:757 118:951
119:1225 120:360 121:694 122:1694 123:1160 124:1340
125:1285 128:582 129:198 130:284 131:645 132:309
133:142 134:252 135:62 136:218 137:238 138:337
139:170 140:485 141:290 142:491 143:376 144:496
145:82 146:517 147:269 148:735 149:330 150:158
151:205 152:450 153:183 154:21 155:437 156:226
157:364 158:285 159:662 160:338 161:414 162:365
163:191 164:710 165:443 166:512 167:560 168:999
169:125 170:916 171:152 172:7 173:1701 174:625
175:454 176:775 177:1337 178:1619 180:1359 181:162
182:1108 183:314 184:610 185:43 186:2198 187:1377
188:1709 189:1596 190:5916 192:6039 193:5547 194:4275
195:3459 196:1234 197:244 198:3894 199:5091 200:6001
201:1958 202:8709 203:8723 204:4402 205:2525 206:2738
207:2800 208:4057 209:3626 210:2834 211:1537 212:2084
213:1838 214:871 215:87 216:5133 217:1570 218:572
219:307 220:1257 221:529 222:338 223:406

End of report
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