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.

Monday, October 1, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Tue 02 Oct, 2012

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

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

BGP routing table entries examined: 427688
Prefixes after maximum aggregation: 178759
Deaggregation factor: 2.39
Unique aggregates announced to Internet: 209565
Total ASes present in the Internet Routing Table: 42236
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33668
Origin ASes announcing only one prefix: 15771
Transit ASes present in the Internet Routing Table: 5627
Transit-only ASes present in the Internet Routing Table: 143
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: 774
Unregistered ASNs in the Routing Table: 284
Number of 32-bit ASNs allocated by the RIRs: 3339
Number of 32-bit ASNs visible in the Routing Table: 2941
Prefixes from 32-bit ASNs in the Routing Table: 7971
Special use prefixes present in the Routing Table: 12
Prefixes being announced from unallocated address space: 151
Number of addresses announced to Internet: 2603466572
Equivalent to 155 /8s, 45 /16s and 191 /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: 150378

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

Prefixes being announced by APNIC Region ASes: 102955
Total APNIC prefixes after maximum aggregation: 32553
APNIC Deaggregation factor: 3.16
Prefixes being announced from the APNIC address blocks: 103639
Unique aggregates announced from the APNIC address blocks: 42834
APNIC Region origin ASes present in the Internet Routing Table: 4765
APNIC Prefixes per ASN: 21.75
APNIC Region origin ASes announcing only one prefix: 1236
APNIC Region transit ASes present in the Internet Routing Table: 775
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: 318
Number of APNIC addresses announced to Internet: 710135424
Equivalent to 42 /8s, 83 /16s and 206 /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: 154530
Total ARIN prefixes after maximum aggregation: 78207
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 155456
Unique aggregates announced from the ARIN address blocks: 69187
ARIN Region origin ASes present in the Internet Routing Table: 15250
ARIN Prefixes per ASN: 10.19
ARIN Region origin ASes announcing only one prefix: 5767
ARIN Region transit ASes present in the Internet Routing Table: 1596
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: 1086854784
Equivalent to 64 /8s, 200 /16s and 22 /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: 108306
Total RIPE prefixes after maximum aggregation: 57196
RIPE Deaggregation factor: 1.89
Prefixes being announced from the RIPE address blocks: 110882
Unique aggregates announced from the RIPE address blocks: 71452
RIPE Region origin ASes present in the Internet Routing Table: 16884
RIPE Prefixes per ASN: 6.57
RIPE Region origin ASes announcing only one prefix: 8140
RIPE Region transit ASes present in the Internet Routing Table: 2719
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: 1911
Number of RIPE addresses announced to Internet: 647302436
Equivalent to 38 /8s, 149 /16s and 13 /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: 43978
Total LACNIC prefixes after maximum aggregation: 8518
LACNIC Deaggregation factor: 5.16
Prefixes being announced from the LACNIC address blocks: 47260
Unique aggregates announced from the LACNIC address blocks: 22420
LACNIC Region origin ASes present in the Internet Routing Table: 1656
LACNIC Prefixes per ASN: 28.54
LACNIC Region origin ASes announcing only one prefix: 453
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: 689
Number of LACNIC addresses announced to Internet: 116996136
Equivalent to 6 /8s, 249 /16s and 56 /24s
Percentage of available LACNIC address space announced: 69.7

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,
191/8, 200/8, 201/8,

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

Prefixes being announced by AfriNIC Region ASes: 9824
Total AfriNIC prefixes after maximum aggregation: 2228
AfriNIC Deaggregation factor: 4.41
Prefixes being announced from the AfriNIC address blocks: 10300
Unique aggregates announced from the AfriNIC address blocks: 3538
AfriNIC Region origin ASes present in the Internet Routing Table: 564
AfriNIC Prefixes per ASN: 18.26
AfriNIC Region origin ASes announcing only one prefix: 175
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: 41902592
Equivalent to 2 /8s, 127 /16s and 98 /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 1762 301 87 TPG Internet Pty Ltd
4755 1624 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
18101 1015 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 3290 3729 176 bellsouth.net, inc.
7029 3165 990 161 Windstream Communications Inc
18566 2084 382 180 Covad Communications
1785 1920 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
20115 1656 1581 617 Charter Communications
4323 1576 1153 386 Time Warner Telecom
30036 1367 272 751 Mediacom Communications Corp
7018 1262 10320 840 AT&T WorldNet Services
7011 1205 329 699 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 1782 544 16 Corbina telecom
2118 1399 97 14 EUnet/RELCOM Autonomous Syste
12479 847 775 74 Uni2 Autonomous System
34984 783 206 181 BILISIM TELEKOM
6830 724 2313 448 UPC Distribution Services
31148 711 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 576 364 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 2197 378 220 TVCABLE BOGOTA
28573 2137 1251 56 NET Servicos de Comunicao S.A
8151 1597 3045 349 UniNet S.A. de C.V.
7303 1561 1034 199 Telecom Argentina Stet-France
6503 1538 435 69 AVANTEL, S.A.
27947 724 74 91 Telconet S.A
3816 643 309 53 Empresa Nacional de Telecomun
6458 621 81 15 GUATEL
11172 592 101 70 Servicios Alestra S.A de C.V
14420 588 87 102 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 890 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 770 958 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 3290 3729 176 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 2197 378 220 TVCABLE BOGOTA
28573 2137 1251 56 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
1785 1920 678 128 PaeTec Communications, Inc.
22773 1887 2931 128 Cox Communications, Inc.
8402 1782 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 3165 3004 Windstream Communications Inc
17974 2355 2301 PT TELEKOMUNIKASI INDONESIA
28573 2137 2081 NET Servicos de Comunicao S.A
4766 2979 2075 Korea Telecom (KIX)
10620 2197 1977 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
1785 1920 1792 PaeTec Communications, Inc.
8402 1782 1766 Corbina telecom
22773 1887 1759 Cox Communications, Inc.
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
128.0.104.0/23 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 /15:1545 /16:12426 /17:6484 /18:10860
/19:21090 /20:30331 /21:32268 /22:42738 /23:40080 /24:223887
/25:1388 /26:1678 /27:914 /28:179 /29:66 /30:18
/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 1838 3290 bellsouth.net, inc.
8402 1493 1782 Corbina telecom
30036 1301 1367 Mediacom Communications Corp
22773 1228 1887 Cox Communications, Inc.
11492 1162 1199 Cable One
6503 1054 1538 AVANTEL, S.A.
1785 1016 1920 PaeTec Communications, Inc.
7011 944 1205 Citizens Utilities

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

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

1:621 2:692 3:1 4:13 5:546 6:3
8:464 12:1981 13:1 14:667 15:11 16:3
17:6 20:27 23:201 24:1785 27:1348 31:1022
32:54 33:2 34:2 36:7 37:820 38:828
39:2 40:133 41:3034 42:159 44:3 46:1597
47:2 49:469 50:598 52:13 54:22 55:8
56:2 57:27 58:989 59:540 60:237 61:1293
62:940 63:1989 64:4282 65:2242 66:4519 67:2088
68:1167 69:3228 70:988 71:509 72:1872 74:2593
75:486 76:312 77:966 78:964 79:496 80:1237
81:967 82:635 83:533 84:517 85:1161 86:491
87:928 88:364 89:1831 90:303 91:5231 92:596
93:1420 94:1628 95:1261 96:424 97:324 98:966
99:39 100:24 101:263 103:1596 105:512 106:118
107:199 108:465 109:1537 110:803 111:971 112:451
113:709 114:626 115:892 116:894 117:732 118:947
119:1228 120:337 121:691 122:1642 123:1166 124:1336
125:1276 128:564 129:190 130:281 131:634 132:309
133:22 134:251 135:61 136:219 137:239 138:338
139:171 140:498 141:279 142:486 143:392 144:497
145:82 146:523 147:267 148:746 149:325 150:155
151:192 152:451 153:177 154:20 155:422 156:224
157:371 158:258 159:659 160:344 161:410 162:363
163:191 164:692 165:423 166:527 167:554 168:966
169:127 170:909 171:168 172:6 173:1682 174:616
175:446 176:787 177:1248 178:1617 180:1333 181:140
182:1060 183:296 184:601 185:16 186:2227 187:1270
188:1699 189:1590 190:6035 192:6039 193:5729 194:4562
195:3478 196:1223 197:229 198:3823 199:5030 200:6030
201:1991 202:8685 203:8697 204:4408 205:2544 206:2764
207:2858 208:4069 209:3650 210:2860 211:1531 212:1994
213:1812 214:874 215:87 216:5140 217:1571 218:570
219:313 220:1249 221:534 222:337 223:415

End of report
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