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.

Tuesday, October 2, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 03 Oct, 2012

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

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

BGP routing table entries examined: 428044
Prefixes after maximum aggregation: 178803
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 209836
Total ASes present in the Internet Routing Table: 42245
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33675
Origin ASes announcing only one prefix: 15767
Transit ASes present in the Internet Routing Table: 5632
Transit-only ASes present in the Internet Routing Table: 142
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 30
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 775
Unregistered ASNs in the Routing Table: 285
Number of 32-bit ASNs allocated by the RIRs: 3342
Number of 32-bit ASNs visible in the Routing Table: 2938
Prefixes from 32-bit ASNs in the Routing Table: 7973
Special use prefixes present in the Routing Table: 12
Prefixes being announced from unallocated address space: 152
Number of addresses announced to Internet: 2603626156
Equivalent to 155 /8s, 48 /16s and 46 /24s
Percentage of available address space announced: 70.3
Percentage of allocated address space announced: 70.3
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: 150345

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

Prefixes being announced by APNIC Region ASes: 102962
Total APNIC prefixes after maximum aggregation: 32563
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103649
Unique aggregates announced from the APNIC address blocks: 42858
APNIC Region origin ASes present in the Internet Routing Table: 4770
APNIC Prefixes per ASN: 21.73
APNIC Region origin ASes announcing only one prefix: 1239
APNIC Region transit ASes present in the Internet Routing Table: 773
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: 319
Number of APNIC addresses announced to Internet: 710135968
Equivalent to 42 /8s, 83 /16s and 208 /24s
Percentage of available APNIC address space announced: 83.0

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: 154598
Total ARIN prefixes after maximum aggregation: 78207
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155523
Unique aggregates announced from the ARIN address blocks: 69271
ARIN Region origin ASes present in the Internet Routing Table: 15249
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5765
ARIN Region transit ASes present in the Internet Routing Table: 1598
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 23
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1086945152
Equivalent to 64 /8s, 201 /16s and 119 /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: 108574
Total RIPE prefixes after maximum aggregation: 57211
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 111148
Unique aggregates announced from the RIPE address blocks: 71512
RIPE Region origin ASes present in the Internet Routing Table: 16890
RIPE Prefixes per ASN: 6.58
RIPE Region origin ASes announcing only one prefix: 8135
RIPE Region transit ASes present in the Internet Routing Table: 2723
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 1912
Number of RIPE addresses announced to Internet: 647345252
Equivalent to 38 /8s, 149 /16s and 180 /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: 44032
Total LACNIC prefixes after maximum aggregation: 8537
LACNIC Deaggregation factor: 5.16
Prefixes being announced from the LACNIC address blocks: 47316
Unique aggregates announced from the LACNIC address blocks: 22517
LACNIC Region origin ASes present in the Internet Routing Table: 1660
LACNIC Prefixes per ASN: 28.50
LACNIC Region origin ASes announcing only one prefix: 454
LACNIC Region transit ASes present in the Internet Routing Table: 317
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: 684
Number of LACNIC addresses announced to Internet: 117024040
Equivalent to 6 /8s, 249 /16s and 165 /24s
Percentage of available LACNIC address space announced: 69.8

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: 9781
Total AfriNIC prefixes after maximum aggregation: 2228
AfriNIC Deaggregation factor: 4.39
Prefixes being announced from the AfriNIC address blocks: 10256
Unique aggregates announced from the AfriNIC address blocks: 3543
AfriNIC Region origin ASes present in the Internet Routing Table: 563
AfriNIC Prefixes per ASN: 18.22
AfriNIC Region origin ASes announcing only one prefix: 174
AfriNIC Region transit ASes present in the Internet Routing Table: 127
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: 41893376
Equivalent to 2 /8s, 127 /16s and 62 /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 2979 11428 904 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
7545 1764 301 86 TPG Internet Pty Ltd
4755 1623 387 163 TATA Communications formerly
9829 1393 1154 41 BSNL National Internet Backbo
9583 1222 90 519 Sify Limited
4808 1122 2046 317 CNCGROUP IP network: China169
7552 1108 1062 11 Vietel Corporation
24560 1040 386 160 Bharti Airtel Ltd., Telemedia
9498 1015 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 3285 3729 177 bellsouth.net, inc.
7029 3165 990 161 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1920 678 128 PaeTec Communications, Inc.
22773 1884 2931 128 Cox Communications, Inc.
20115 1657 1581 618 Charter Communications
4323 1576 1153 386 Time Warner Telecom
30036 1367 272 751 Mediacom Communications Corp
7018 1264 10320 842 AT&T WorldNet Services
11492 1201 217 338 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 1731 544 16 Corbina telecom
2118 1399 97 14 EUnet/RELCOM Autonomous Syste
12479 847 775 74 Uni2 Autonomous System
34984 793 206 181 BILISIM TELEKOM
6830 725 2313 449 UPC Distribution Services
31148 715 37 9 FreeNet ISP
13188 696 92 151 Educational Network
20940 696 221 528 Akamai Technologies European
58113 631 70 366 LIR DATACENTER TELECOM SRL
8551 574 364 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 2198 378 221 TVCABLE BOGOTA
28573 2141 1251 56 NET Servicos de Comunicao S.A
8151 1597 3045 349 UniNet S.A. de C.V.
7303 1562 1034 200 Telecom Argentina Stet-France
6503 1538 435 69 AVANTEL, S.A.
27947 724 74 91 Telconet S.A
3816 644 309 70 Empresa Nacional de Telecomun
6458 621 81 15 GUATEL
11172 592 101 70 Servicios Alestra S.A de C.V
14420 589 87 101 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 891 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 730 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 269 80 8 RAYA Telecom - Egypt
3741 267 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 192 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
33776 189 12 13 Starcomms Nigeria Limited

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 3285 3729 177 bellsouth.net, inc.
7029 3165 990 161 Windstream Communications Inc
4766 2979 11428 904 Korea Telecom (KIX)
17974 2355 702 54 PT TELEKOMUNIKASI INDONESIA
10620 2198 378 221 TVCABLE BOGOTA
28573 2141 1251 56 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1920 678 128 PaeTec Communications, Inc.
22773 1884 2931 128 Cox Communications, Inc.
7545 1764 301 86 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 3165 3004 Windstream Communications Inc
17974 2355 2301 PT TELEKOMUNIKASI INDONESIA
28573 2141 2085 NET Servicos de Comunicao S.A
4766 2979 2075 Korea Telecom (KIX)
10620 2198 1977 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1920 1792 PaeTec Communications, Inc.
22773 1884 1756 Cox Communications, Inc.
8402 1731 1715 Corbina telecom
7545 1764 1678 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
128.0.104.0/23 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
128.0.170.0/24 24685 ISP Elencom autonomous system

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
/13:477 /14:846 /15:1543 /16:12426 /17:6481 /18:10860
/19:21098 /20:30372 /21:32311 /22:42760 /23:40093 /24:224119
/25:1391 /26:1681 /27:911 /28:179 /29:66 /30:17
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2648 3165 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1836 3285 bellsouth.net, inc.
8402 1467 1731 Corbina telecom
30036 1301 1367 Mediacom Communications Corp
22773 1226 1884 Cox Communications, Inc.
11492 1164 1201 Cable One
6503 1054 1538 AVANTEL, S.A.
1785 1016 1920 PaeTec Communications, Inc.
7011 943 1200 Citizens Utilities

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

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

1:621 2:697 3:1 4:13 5:548 6:3
8:464 12:1978 13:1 14:665 15:11 16:3
17:6 20:27 23:201 24:1783 27:1352 31:1022
32:54 33:2 34:2 36:7 37:820 38:830
39:2 40:133 41:2995 42:159 44:3 46:1596
47:2 49:469 50:599 52:12 54:22 55:8
56:2 57:27 58:989 59:541 60:237 61:1294
62:941 63:1989 64:4273 65:2242 66:4521 67:2127
68:1169 69:3230 70:987 71:513 72:1874 74:2599
75:486 76:308 77:968 78:936 79:497 80:1243
81:967 82:633 83:534 84:519 85:1162 86:486
87:929 88:364 89:1797 90:303 91:5231 92:594
93:1512 94:1630 95:1215 96:424 97:325 98:963
99:39 100:24 101:264 103:1611 105:512 106:118
107:199 108:465 109:1539 110:803 111:968 112:451
113:711 114:634 115:893 116:895 117:732 118:947
119:1228 120:337 121:690 122:1644 123:1166 124:1337
125:1276 128:539 129:190 130:281 131:635 132:310
133:22 134:251 135:61 136:219 137:242 138:338
139:171 140:498 141:282 142:487 143:395 144:498
145:82 146:524 147:277 148:745 149:325 150:155
151:192 152:451 153:178 154:20 155:423 156:224
157:372 158:258 159:659 160:344 161:410 162:365
163:191 164:693 165:423 166:527 167:554 168:987
169:127 170:905 171:168 172:6 173:1681 174:618
175:444 176:787 177:1255 178:1613 180:1342 181:141
182:1059 183:297 184:598 185:21 186:2209 187:1269
188:1698 189:1587 190:6026 192:6040 193:5731 194:4748
195:3517 196:1225 197:225 198:3829 199:5047 200:6038
201:1979 202:8668 203:8704 204:4400 205:2537 206:2761
207:2833 208:4065 209:3645 210:2859 211:1531 212:1993
213:1810 214:888 215:87 216:5144 217:1571 218:570
219:313 220:1251 221:534 222:337 223:415

End of report
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