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 27, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 28 Jun, 2013

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

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

BGP routing table entries examined: 457026
Prefixes after maximum aggregation: 186181
Deaggregation factor: 2.45
Unique aggregates announced to Internet: 227140
Total ASes present in the Internet Routing Table: 44393
Prefixes per ASN: 10.30
Origin-only ASes present in the Internet Routing Table: 34755
Origin ASes announcing only one prefix: 16163
Transit ASes present in the Internet Routing Table: 5888
Transit-only ASes present in the Internet Routing Table: 146
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: 1657
Unregistered ASNs in the Routing Table: 734
Number of 32-bit ASNs allocated by the RIRs: 4828
Number of 32-bit ASNs visible in the Routing Table: 3750
Prefixes from 32-bit ASNs in the Routing Table: 10983
Special use prefixes present in the Routing Table: 24
Prefixes being announced from unallocated address space: 219
Number of addresses announced to Internet: 2643086892
Equivalent to 157 /8s, 138 /16s and 78 /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: 94.7
Total number of prefixes smaller than registry allocations: 160079

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

Prefixes being announced by APNIC Region ASes: 109817
Total APNIC prefixes after maximum aggregation: 33677
APNIC Deaggregation factor: 3.26
Prefixes being announced from the APNIC address blocks: 111642
Unique aggregates announced from the APNIC address blocks: 45653
APNIC Region origin ASes present in the Internet Routing Table: 4855
APNIC Prefixes per ASN: 23.00
APNIC Region origin ASes announcing only one prefix: 1222
APNIC Region transit ASes present in the Internet Routing Table: 823
Average APNIC Region AS path length visible: 4.6
Max APNIC Region AS path length visible: 22
Number of APNIC region 32-bit ASNs visible in the Routing Table: 589
Number of APNIC addresses announced to Internet: 725434336
Equivalent to 43 /8s, 61 /16s and 63 /24s
Percentage of available APNIC address space announced: 84.8

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: 158893
Total ARIN prefixes after maximum aggregation: 80432
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 159529
Unique aggregates announced from the ARIN address blocks: 74161
ARIN Region origin ASes present in the Internet Routing Table: 15761
ARIN Prefixes per ASN: 10.12
ARIN Region origin ASes announcing only one prefix: 6005
ARIN Region transit ASes present in the Internet Routing Table: 1648
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: 1081764672
Equivalent to 64 /8s, 122 /16s and 107 /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: 117631
Total RIPE prefixes after maximum aggregation: 60171
RIPE Deaggregation factor: 1.95
Prefixes being announced from the RIPE address blocks: 121030
Unique aggregates announced from the RIPE address blocks: 78450
RIPE Region origin ASes present in the Internet Routing Table: 17248
RIPE Prefixes per ASN: 7.02
RIPE Region origin ASes announcing only one prefix: 8170
RIPE Region transit ASes present in the Internet Routing Table: 2835
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: 2370
Number of RIPE addresses announced to Internet: 656789604
Equivalent to 39 /8s, 37 /16s and 208 /24s
Percentage of available RIPE address space announced: 95.5

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: 48534
Total LACNIC prefixes after maximum aggregation: 9348
LACNIC Deaggregation factor: 5.19
Prefixes being announced from the LACNIC address blocks: 52894
Unique aggregates announced from the LACNIC address blocks: 24698
LACNIC Region origin ASes present in the Internet Routing Table: 1965
LACNIC Prefixes per ASN: 26.92
LACNIC Region origin ASes announcing only one prefix: 582
LACNIC Region transit ASes present in the Internet Routing Table: 361
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: 766
Number of LACNIC addresses announced to Internet: 132576168
Equivalent to 7 /8s, 230 /16s and 243 /24s
Percentage of available LACNIC address space announced: 79.0

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: 11078
Total AfriNIC prefixes after maximum aggregation: 2511
AfriNIC Deaggregation factor: 4.41
Prefixes being announced from the AfriNIC address blocks: 11712
Unique aggregates announced from the AfriNIC address blocks: 3977
AfriNIC Region origin ASes present in the Internet Routing Table: 639
AfriNIC Prefixes per ASN: 18.33
AfriNIC Region origin ASes announcing only one prefix: 184
AfriNIC Region transit ASes present in the Internet Routing Table: 134
Average AfriNIC Region AS path length visible: 4.9
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: 46231808
Equivalent to 2 /8s, 193 /16s and 113 /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 2562 855 92 PT TELEKOMUNIKASI INDONESIA
7545 2016 320 109 TPG Internet Pty Ltd
4755 1749 391 191 TATA Communications formerly
9829 1519 1205 40 BSNL National Internet Backbo
9583 1291 98 536 Sify Limited
7552 1175 1080 13 Vietel Corporation
4808 1147 2124 334 CNCGROUP IP network: China169
9498 1142 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 2993 3691 72 bellsouth.net, inc.
18566 2064 382 184 Covad Communications
1785 1995 678 126 PaeTec Communications, Inc.
22773 1985 2927 123 Cox Communications, Inc.
20115 1665 1617 617 Charter Communications
4323 1623 1138 403 Time Warner Telecom
701 1533 11127 800 UUNET Technologies, Inc.
30036 1334 299 646 Mediacom Communications Corp
7018 1301 11039 828 AT&T WorldNet Services
11492 1219 216 358 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 1629 544 16 Corbina telecom
34984 1284 244 221 BILISIM TELEKOM
2118 1085 97 13 EUnet/RELCOM Autonomous Syste
20940 912 322 716 Akamai Technologies European
13188 825 98 79 Educational Network
31148 806 40 25 FreeNet ISP
8551 776 370 44 Bezeq International
6830 766 2376 440 UPC Distribution Services
12479 673 789 57 Uni2 Autonomous System
34744 658 171 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 2871 1568 119 NET Servicos de Comunicao S.A
10620 2675 420 199 TVCABLE BOGOTA
7303 1732 1155 221 Telecom Argentina Stet-France
8151 1262 2725 385 UniNet S.A. de C.V.
18881 1007 844 20 Global Village Telecom
6503 864 434 64 AVANTEL, S.A.
27947 820 94 93 Telconet S.A
3816 717 306 85 Empresa Nacional de Telecomun
7738 698 1370 35 Telecomunicacoes da Bahia S.A
11172 615 88 65 Servicios Alestra S.A de C.V

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 884 274 30 LINKdotNET AS number
6713 542 617 25 Itissalat Al-MAGHRIB
8452 469 956 9 TEDATA
24835 344 80 8 RAYA Telecom - Egypt
3741 259 922 218 The Internet Solution
15706 222 32 6 Sudatel Internet Exchange Aut
37054 211 11 5 Data Telecom Service
29571 209 17 12 Ci Telecom Autonomous system
36992 201 527 21 Etisalat MISR

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 2993 3691 72 bellsouth.net, inc.
4766 2945 11561 922 Korea Telecom (KIX)
28573 2871 1568 119 NET Servicos de Comunicao S.A
10620 2675 420 199 TVCABLE BOGOTA
17974 2562 855 92 PT TELEKOMUNIKASI INDONESIA
18566 2064 382 184 Covad Communications
7545 2016 320 109 TPG Internet Pty Ltd
1785 1995 678 126 PaeTec Communications, Inc.
22773 1985 2927 123 Cox Communications, Inc.
4755 1749 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 2871 2752 NET Servicos de Comunicao S.A
10620 2675 2476 TVCABLE BOGOTA
17974 2562 2470 PT TELEKOMUNIKASI INDONESIA
4766 2945 2023 Korea Telecom (KIX)
7545 2016 1907 TPG Internet Pty Ltd
18566 2064 1880 Covad Communications
1785 1995 1869 PaeTec Communications, Inc.
22773 1985 1862 Cox Communications, Inc.
8402 1629 1613 Corbina telecom
4755 1749 1558 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
128.0.57.0/24 60993 Totalsoft SA
128.0.58.0/23 9050 RTD-ROMTELECOM Autonomous Sys
128.0.60.0/24 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 /14:898 /15:1602 /16:12706 /17:6636 /18:11103
/19:22446 /20:32077 /21:34480 /22:47997 /23:42361 /24:239885
/25:1305 /26:1641 /27:862 /28:45 /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 1717 2993 bellsouth.net, inc.
8402 1325 1629 Corbina telecom
22773 1292 1985 Cox Communications, Inc.
36998 1231 1237 MOBITEL
30036 1202 1334 Mediacom Communications Corp
11492 1181 1219 Cable One
1785 1063 1995 PaeTec Communications, Inc.
6983 1015 1145 ITC^Deltacom
10620 995 2675 TVCABLE BOGOTA

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

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

1:838 2:811 3:3 4:19 5:812 6:15
8:563 12:1916 13:3 14:856 15:11 16:3
17:10 20:17 23:280 24:1769 27:1496 31:1250
32:43 33:2 34:5 36:47 37:1868 38:877
39:2 40:170 41:2829 42:203 44:8 46:1917
47:1 49:658 50:753 52:12 54:35 55:5
57:26 58:1159 59:577 60:322 61:1410 62:1120
63:2026 64:4332 65:2156 66:4181 67:2041 68:1079
69:3270 70:832 71:496 72:1913 74:2461 75:323
76:302 77:1111 78:1051 79:625 80:1271 81:1016
82:623 83:594 84:585 85:1177 86:450 87:1011
88:538 89:1761 90:148 91:5524 92:609 93:1736
94:1874 95:1652 96:514 97:345 98:1013 99:42
100:30 101:330 103:2867 105:519 106:142 107:207
108:511 109:1837 110:908 111:1062 112:547 113:818
114:698 115:966 116:961 117:800 118:1107 119:1320
120:388 121:733 122:1798 123:1225 124:1378 125:1384
128:638 129:225 130:309 131:663 132:359 133:155
134:267 135:68 136:223 137:242 138:341 139:193
140:211 141:328 142:538 143:384 144:500 145:94
146:504 147:383 148:665 149:349 150:157 151:517
152:420 153:189 154:24 155:418 156:269 157:396
158:279 159:718 160:346 161:454 162:468 163:222
164:604 165:498 166:244 167:596 168:1046 169:129
170:1055 171:180 172:21 173:1582 174:541 175:472
176:972 177:2082 178:1869 179:48 180:1462 181:473
182:1244 183:386 184:662 185:567 186:2273 187:1279
188:2064 189:1274 190:6745 192:6769 193:5675 194:4609
195:3457 196:1377 197:980 198:4509 199:5351 200:5986
201:2213 202:8809 203:8882 204:4511 205:2571 206:2800
207:2844 208:4037 209:3629 210:2935 211:1516 212:2178
213:1967 214:925 215:99 216:5242 217:1626 218:619
219:335 220:1282 221:557 222:325 223:447

End of report
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