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.

Thursday, June 20, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 21 Jun, 2013

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

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

BGP routing table entries examined: 455937
Prefixes after maximum aggregation: 186100
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 226632
Total ASes present in the Internet Routing Table: 44336
Prefixes per ASN: 10.28
Origin-only ASes present in the Internet Routing Table: 34739
Origin ASes announcing only one prefix: 16161
Transit ASes present in the Internet Routing Table: 5867
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: 29
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 1266
Unregistered ASNs in the Routing Table: 565
Number of 32-bit ASNs allocated by the RIRs: 4809
Number of 32-bit ASNs visible in the Routing Table: 3730
Prefixes from 32-bit ASNs in the Routing Table: 10861
Special use prefixes present in the Routing Table: 26
Prefixes being announced from unallocated address space: 229
Number of addresses announced to Internet: 2641830956
Equivalent to 157 /8s, 119 /16s and 36 /24s
Percentage of available address space announced: 71.4
Percentage of allocated address space announced: 71.4
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 94.6
Total number of prefixes smaller than registry allocations: 160017

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

Prefixes being announced by APNIC Region ASes: 109546
Total APNIC prefixes after maximum aggregation: 33621
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 111094
Unique aggregates announced from the APNIC address blocks: 45353
APNIC Region origin ASes present in the Internet Routing Table: 4852
APNIC Prefixes per ASN: 22.90
APNIC Region origin ASes announcing only one prefix: 1220
APNIC Region transit ASes present in the Internet Routing Table: 821
Average APNIC Region AS path length visible: 4.8
Max APNIC Region AS path length visible: 25
Number of APNIC region 32-bit ASNs visible in the Routing Table: 581
Number of APNIC addresses announced to Internet: 724746976
Equivalent to 43 /8s, 50 /16s and 194 /24s
Percentage of available APNIC address space announced: 84.7

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: 158854
Total ARIN prefixes after maximum aggregation: 80430
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159530
Unique aggregates announced from the ARIN address blocks: 74003
ARIN Region origin ASes present in the Internet Routing Table: 15743
ARIN Prefixes per ASN: 10.13
ARIN Region origin ASes announcing only one prefix: 5993
ARIN Region transit ASes present in the Internet Routing Table: 1642
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 27
Number of ARIN region 32-bit ASNs visible in the Routing Table: 19
Number of ARIN addresses announced to Internet: 1081740864
Equivalent to 64 /8s, 122 /16s and 14 /24s
Percentage of available ARIN address space announced: 57.2

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, 62464-63487, 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: 117258
Total RIPE prefixes after maximum aggregation: 60139
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 120857
Unique aggregates announced from the RIPE address blocks: 78334
RIPE Region origin ASes present in the Internet Routing Table: 17237
RIPE Prefixes per ASN: 7.01
RIPE Region origin ASes announcing only one prefix: 8175
RIPE Region transit ASes present in the Internet Routing Table: 2831
Average RIPE Region AS path length visible: 5.1
Max RIPE Region AS path length visible: 29
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2359
Number of RIPE addresses announced to Internet: 656436580
Equivalent to 39 /8s, 32 /16s and 109 /24s
Percentage of available RIPE address space announced: 95.4

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: 48401
Total LACNIC prefixes after maximum aggregation: 9359
LACNIC Deaggregation factor: 5.17
Prefixes being announced from the LACNIC address blocks: 52747
Unique aggregates announced from the LACNIC address blocks: 24807
LACNIC Region origin ASes present in the Internet Routing Table: 1961
LACNIC Prefixes per ASN: 26.90
LACNIC Region origin ASes announcing only one prefix: 582
LACNIC Region transit ASes present in the Internet Routing Table: 359
Average LACNIC Region AS path length visible: 4.8
Max LACNIC Region AS path length visible: 29
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 765
Number of LACNIC addresses announced to Internet: 132381352
Equivalent to 7 /8s, 227 /16s and 250 /24s
Percentage of available LACNIC address space announced: 78.9

LACNIC AS Blocks 26592-26623, 27648-28671, 52224-53247,
61440-61951, 262144-263679 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: 10922
Total AfriNIC prefixes after maximum aggregation: 2509
AfriNIC Deaggregation factor: 4.35
Prefixes being announced from the AfriNIC address blocks: 11480
Unique aggregates announced from the AfriNIC address blocks: 3923
AfriNIC Region origin ASes present in the Internet Routing Table: 641
AfriNIC Prefixes per ASN: 17.91
AfriNIC Region origin ASes announcing only one prefix: 191
AfriNIC Region transit ASes present in the Internet Routing Table: 132
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: 46221568
Equivalent to 2 /8s, 193 /16s and 73 /24s
Percentage of available AfriNIC address space announced: 45.9

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 2945 11561 922 Korea Telecom (KIX)
17974 2554 855 91 PT TELEKOMUNIKASI INDONESIA
7545 2010 320 109 TPG Internet Pty Ltd
4755 1747 391 191 TATA Communications formerly
9829 1518 1205 40 BSNL National Internet Backbo
9583 1290 98 536 Sify Limited
7552 1152 1080 13 Vietel Corporation
4808 1146 2124 334 CNCGROUP IP network: China169
9498 1133 309 71 BHARTI Airtel Ltd.
24560 1077 394 164 Bharti Airtel Ltd., Telemedia

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 2999 3691 73 bellsouth.net, inc.
18566 2064 382 184 Covad Communications
1785 1993 678 125 PaeTec Communications, Inc.
22773 1982 2927 123 Cox Communications, Inc.
20115 1667 1618 615 Charter Communications
4323 1623 1138 403 Time Warner Telecom
701 1532 11143 799 UUNET Technologies, Inc.
30036 1336 301 645 Mediacom Communications Corp
7018 1298 11039 830 AT&T WorldNet Services
11492 1221 217 360 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 1696 544 16 Corbina telecom
34984 1279 244 222 BILISIM TELEKOM
2118 1069 97 13 EUnet/RELCOM Autonomous Syste
20940 898 313 701 Akamai Technologies European
13188 825 98 79 Educational Network
31148 803 40 26 FreeNet ISP
8551 773 370 44 Bezeq International
6830 766 2376 440 UPC Distribution Services
12479 683 788 56 Uni2 Autonomous System
34744 675 172 76 SC GVM SISTEM 2003 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
28573 2788 1556 108 NET Servicos de Comunicao S.A
10620 2662 418 209 TVCABLE BOGOTA
7303 1732 1155 221 Telecom Argentina Stet-France
8151 1256 2719 386 UniNet S.A. de C.V.
18881 1002 844 20 Global Village Telecom
6503 864 434 64 AVANTEL, S.A.
27947 842 89 106 Telconet S.A
3816 715 306 85 Empresa Nacional de Telecomun
7738 698 1370 35 Telecomunicacoes da Bahia S.A
6147 665 374 25 Telefonica Del Peru

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
36998 1237 80 4 MOBITEL
24863 883 274 30 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 464 956 9 TEDATA
24835 344 80 8 RAYA Telecom - Egypt
3741 261 922 219 The Internet Solution
15706 222 32 6 Sudatel Internet Exchange Aut
29571 207 17 12 Ci Telecom Autonomous system
36992 198 527 21 Etisalat MISR
12258 193 28 66 Vodacom Internet Company

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 2999 3691 73 bellsouth.net, inc.
4766 2945 11561 922 Korea Telecom (KIX)
28573 2788 1556 108 NET Servicos de Comunicao S.A
10620 2662 418 209 TVCABLE BOGOTA
17974 2554 855 91 PT TELEKOMUNIKASI INDONESIA
18566 2064 382 184 Covad Communications
7545 2010 320 109 TPG Internet Pty Ltd
1785 1993 678 125 PaeTec Communications, Inc.
22773 1982 2927 123 Cox Communications, Inc.
4755 1747 391 191 TATA Communications formerly

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

Global Per AS Maximum Aggr summary
----------------------------------

ASN No of nets Net Savings Description
28573 2788 2680 NET Servicos de Comunicao S.A
17974 2554 2463 PT TELEKOMUNIKASI INDONESIA
10620 2662 2453 TVCABLE BOGOTA
4766 2945 2023 Korea Telecom (KIX)
7545 2010 1901 TPG Internet Pty Ltd
18566 2064 1880 Covad Communications
1785 1993 1868 PaeTec Communications, Inc.
22773 1982 1859 Cox Communications, Inc.
8402 1696 1680 Corbina telecom
4755 1747 1556 TATA Communications formerly

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

List of Unregistered Origin ASNs (Global)
-----------------------------------------

Bad AS Designation Network Transit AS Description
15132 UNALLOCATED 12.9.150.0/24 7018 AT&T WorldNet Servic
30031 UNALLOCATED 12.27.122.0/24 7018 AT&T WorldNet Servic
13317 UNALLOCATED 12.44.10.0/24 7018 AT&T WorldNet Servic
23502 UNALLOCATED 12.44.44.0/24 7018 AT&T WorldNet Servic
17300 UNALLOCATED 12.45.103.0/24 209 Qwest
17300 UNALLOCATED 12.45.110.0/24 701 UUNET Technologies,
16476 UNALLOCATED 12.46.27.0/24 7018 AT&T WorldNet Servic
14764 UNALLOCATED 12.108.237.0/24 7018 AT&T WorldNet Servic
33649 UNALLOCATED 12.111.112.0/24 19029 New Edge Networks
26064 UNALLOCATED 12.149.37.0/24 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
128.0.0.0/24 2876 Jump Management SRL
128.0.16.0/21 43568 RIPE Network Coordination Cen
128.0.24.0/21 41794 Altline LLC
128.0.46.0/23 39743 Mobimax Telecom SRL
128.0.53.0/24 60993 Totalsoft SA
128.0.54.0/24 60972 Carpatair SA
128.0.55.0/24 48571 SC efectRO SRL
128.0.56.0/24 60996 >>UNKNOWN<<
128.0.57.0/24 60993 Totalsoft SA
128.0.58.0/23 9050 RTD-ROMTELECOM Autonomous Sys

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

Advertised Unallocated Addresses
--------------------------------

Network Origin AS Description
62.61.220.0/24 24974 Tachyon Europe BV - Wireless
62.61.221.0/24 24974 Tachyon Europe BV - Wireless
64.185.224.0/24 27431 JTL Networks Inc.
64.185.225.0/24 27431 JTL Networks Inc.
64.185.226.0/24 27431 JTL Networks Inc.
64.185.227.0/24 27431 JTL Networks Inc.
64.185.228.0/24 27431 JTL Networks Inc.
64.185.229.0/24 27431 JTL Networks Inc.
64.185.230.0/24 27431 JTL Networks Inc.
64.185.231.0/24 27431 JTL Networks Inc.

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 /8:17 /9:11 /10:30 /11:91 /12:250
/13:483 /14:899 /15:1602 /16:12700 /17:6639 /18:11176
/19:22167 /20:32037 /21:34413 /22:47607 /23:42190 /24:239666
/25:1305 /26:1658 /27:850 /28:46 /29:65 /30:19
/31:0 /32:16

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

ASN No of nets Total ann. Description
18566 2015 2064 Covad Communications
6389 1722 2999 bellsouth.net, inc.
8402 1392 1696 Corbina telecom
22773 1289 1982 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1203 1336 Mediacom Communications Corp
11492 1183 1221 Cable One
1785 1062 1993 PaeTec Communications, Inc.
6983 1011 1139 ITC^Deltacom
10620 992 2662 TVCABLE BOGOTA

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

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

1:831 2:838 3:3 4:19 5:799 6:15
8:557 12:1926 13:3 14:848 15:11 16:3
17:10 20:17 23:314 24:1770 27:1488 31:1327
32:43 33:2 34:5 36:45 37:1869 38:879
39:2 40:170 41:2763 42:202 44:8 46:1905
47:2 49:662 50:735 52:12 54:35 55:8
57:26 58:1161 59:578 60:316 61:1408 62:1126
63:2026 64:4309 65:2159 66:4163 67:2079 68:1066
69:3268 70:833 71:487 72:1908 74:2476 75:321
76:303 77:1124 78:1051 79:611 80:1262 81:1008
82:622 83:580 84:539 85:1167 86:435 87:993
88:541 89:1746 90:146 91:5514 92:607 93:1730
94:1870 95:1665 96:515 97:346 98:1010 99:42
100:30 101:328 103:2827 105:517 106:150 107:208
108:513 109:1836 110:905 111:1044 112:546 113:813
114:694 115:960 116:958 117:799 118:1108 119:1326
120:388 121:732 122:1794 123:1221 124:1376 125:1362
128:639 129:222 130:309 131:666 132:360 133:155
134:268 135:67 136:223 137:242 138:348 139:192
140:209 141:331 142:532 143:388 144:502 145:94
146:507 147:381 148:669 149:348 150:157 151:533
152:420 153:189 154:23 155:412 156:269 157:397
158:279 159:728 160:345 161:448 162:445 163:222
164:602 165:498 166:241 167:596 168:1037 169:130
170:1042 171:182 172:21 173:1579 174:535 175:470
176:986 177:2056 178:1856 179:37 180:1451 181:464
182:1214 183:388 184:655 185:547 186:2263 187:1274
188:2146 189:1267 190:6812 192:6727 193:5672 194:4600
195:3439 196:1353 197:946 198:4494 199:5341 200:5978
201:2230 202:8825 203:8898 204:4509 205:2565 206:2801
207:2845 208:4061 209:3683 210:2933 211:1514 212:2183
213:1990 214:925 215:99 216:5300 217:1620 218:615
219:335 220:1276 221:559 222:326 223:458

End of report
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