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, September 5, 2013

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Fri 06 Sep, 2013

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

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

BGP routing table entries examined: 466358
Prefixes after maximum aggregation: 188038
Deaggregation factor: 2.48
Unique aggregates announced to Internet: 231739
Total ASes present in the Internet Routing Table: 44889
Prefixes per ASN: 10.39
Origin-only ASes present in the Internet Routing Table: 35071
Origin ASes announcing only one prefix: 16254
Transit ASes present in the Internet Routing Table: 5921
Transit-only ASes present in the Internet Routing Table: 165
Average AS path length visible in the Internet Routing Table: 4.6
Max AS path length visible: 28
Max AS path prepend of ASN ( 36992) 22
Prefixes from unregistered ASNs in the Routing Table: 5622
Unregistered ASNs in the Routing Table: 1894
Number of 32-bit ASNs allocated by the RIRs: 5000
Number of 32-bit ASNs visible in the Routing Table: 3897
Prefixes from 32-bit ASNs in the Routing Table: 11903
Special use prefixes present in the Routing Table: 1
Prefixes being announced from unallocated address space: 356
Number of addresses announced to Internet: 2640319188
Equivalent to 157 /8s, 96 /16s and 18 /24s
Percentage of available address space announced: 71.3
Percentage of allocated address space announced: 71.3
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 95.0
Total number of prefixes smaller than registry allocations: 163248

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

Prefixes being announced by APNIC Region ASes: 110420
Total APNIC prefixes after maximum aggregation: 33492
APNIC Deaggregation factor: 3.30
Prefixes being announced from the APNIC address blocks: 112346
Unique aggregates announced from the APNIC address blocks: 46770
APNIC Region origin ASes present in the Internet Routing Table: 4866
APNIC Prefixes per ASN: 23.09
APNIC Region origin ASes announcing only one prefix: 1223
APNIC Region transit ASes present in the Internet Routing Table: 828
Average APNIC Region AS path length visible: 4.7
Max APNIC Region AS path length visible: 23
Number of APNIC region 32-bit ASNs visible in the Routing Table: 659
Number of APNIC addresses announced to Internet: 728133824
Equivalent to 43 /8s, 102 /16s and 112 /24s
Percentage of available APNIC address space announced: 85.1

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: 161486
Total ARIN prefixes after maximum aggregation: 81077
ARIN Deaggregation factor: 1.99
Prefixes being announced from the ARIN address blocks: 162085
Unique aggregates announced from the ARIN address blocks: 75503
ARIN Region origin ASes present in the Internet Routing Table: 15859
ARIN Prefixes per ASN: 10.22
ARIN Region origin ASes announcing only one prefix: 6016
ARIN Region transit ASes present in the Internet Routing Table: 1661
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: 20
Number of ARIN addresses announced to Internet: 1071152128
Equivalent to 63 /8s, 216 /16s and 124 /24s
Percentage of available ARIN address space announced: 56.7

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: 119709
Total RIPE prefixes after maximum aggregation: 61167
RIPE Deaggregation factor: 1.96
Prefixes being announced from the RIPE address blocks: 123537
Unique aggregates announced from the RIPE address blocks: 79404
RIPE Region origin ASes present in the Internet Routing Table: 17401
RIPE Prefixes per ASN: 7.10
RIPE Region origin ASes announcing only one prefix: 8245
RIPE Region transit ASes present in the Internet Routing Table: 2828
Average RIPE Region AS path length visible: 5.2
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2392
Number of RIPE addresses announced to Internet: 657183460
Equivalent to 39 /8s, 43 /16s and 210 /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: 51106
Total LACNIC prefixes after maximum aggregation: 9712
LACNIC Deaggregation factor: 5.26
Prefixes being announced from the LACNIC address blocks: 55770
Unique aggregates announced from the LACNIC address blocks: 25813
LACNIC Region origin ASes present in the Internet Routing Table: 2013
LACNIC Prefixes per ASN: 27.70
LACNIC Region origin ASes announcing only one prefix: 571
LACNIC Region transit ASes present in the Internet Routing Table: 379
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 820
Number of LACNIC addresses announced to Internet: 136536624
Equivalent to 8 /8s, 35 /16s and 98 /24s
Percentage of available LACNIC address space announced: 81.4

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: 11643
Total AfriNIC prefixes after maximum aggregation: 2540
AfriNIC Deaggregation factor: 4.58
Prefixes being announced from the AfriNIC address blocks: 12264
Unique aggregates announced from the AfriNIC address blocks: 3920
AfriNIC Region origin ASes present in the Internet Routing Table: 652
AfriNIC Prefixes per ASN: 18.81
AfriNIC Region origin ASes announcing only one prefix: 199
AfriNIC Region transit ASes present in the Internet Routing Table: 138
Average AfriNIC Region AS path length visible: 4.7
Max AfriNIC Region AS path length visible: 24
Number of AfriNIC region 32-bit ASNs visible in the Routing Table: 6
Number of AfriNIC addresses announced to Internet: 46557952
Equivalent to 2 /8s, 198 /16s and 107 /24s
Percentage of available AfriNIC address space announced: 46.3

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 2919 11561 924 Korea Telecom (KIX)
17974 2671 903 91 PT TELEKOMUNIKASI INDONESIA
7545 2067 320 111 TPG Internet Pty Ltd
4755 1768 390 190 TATA Communications formerly
9829 1541 1237 46 BSNL National Internet Backbo
9583 1227 92 506 Sify Limited
9498 1183 309 70 BHARTI Airtel Ltd.
4808 1160 2129 342 CNCGROUP IP network: China169
7552 1139 1080 13 Vietel Corporation
24560 1090 394 160 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 3069 3689 62 bellsouth.net, inc.
18566 2065 382 184 Covad Communications
22773 2041 2933 125 Cox Communications, Inc.
1785 2013 679 125 PaeTec Communications, Inc.
20115 1675 1645 630 Charter Communications
4323 1617 1103 409 Time Warner Telecom
701 1520 11119 796 UUNET Technologies, Inc.
30036 1349 302 641 Mediacom Communications Corp
7018 1314 11277 828 AT&T WorldNet Services
11492 1220 218 366 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 1745 544 16 Corbina telecom
34984 1312 244 221 BILISIM TELEKOM
2118 1178 97 13 EUnet/RELCOM Autonomous Syste
20940 990 355 768 Akamai Technologies European
31148 982 43 18 FreeNet ISP
6830 894 2367 427 UPC Distribution Services
13188 846 99 72 Educational Network
8551 752 370 41 Bezeq International
12479 687 797 53 Uni2 Autonomous System
58113 541 55 339 LIR DATACENTER TELECOM 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 3224 1705 98 NET Servicos de Comunicao S.A
10620 2544 416 259 TVCABLE BOGOTA
7303 1741 1166 223 Telecom Argentina Stet-France
18881 1428 844 20 Global Village Telecom
8151 1288 2776 391 UniNet S.A. de C.V.
11830 933 364 15 Instituto Costarricense de El
27947 838 94 91 Telconet S.A
6503 813 434 64 AVANTEL, S.A.
7738 764 1498 36 Telecomunicacoes da Bahia S.A
6147 734 374 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 1861 112 5 MOBITEL
24863 869 274 30 LINKdotNET AS number
6713 543 633 26 Itissalat Al-MAGHRIB
8452 435 956 9 TEDATA
24835 291 80 8 RAYA Telecom - Egypt
3741 258 921 217 The Internet Solution
36992 222 501 28 Etisalat MISR
15706 221 32 6 Sudatel Internet Exchange Aut
29571 219 16 11 Ci Telecom Autonomous system
12258 193 28 71 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
28573 3224 1705 98 NET Servicos de Comunicao S.A
6389 3069 3689 62 bellsouth.net, inc.
4766 2919 11561 924 Korea Telecom (KIX)
17974 2671 903 91 PT TELEKOMUNIKASI INDONESIA
10620 2544 416 259 TVCABLE BOGOTA
7545 2067 320 111 TPG Internet Pty Ltd
18566 2065 382 184 Covad Communications
22773 2041 2933 125 Cox Communications, Inc.
1785 2013 679 125 PaeTec Communications, Inc.
36998 1861 112 5 MOBITEL

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

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

ASN No of nets Net Savings Description
6389 3069 3007 bellsouth.net, inc.
17974 2671 2580 PT TELEKOMUNIKASI INDONESIA
10620 2544 2285 TVCABLE BOGOTA
4766 2919 1995 Korea Telecom (KIX)
7545 2067 1956 TPG Internet Pty Ltd
22773 2041 1916 Cox Communications, Inc.
1785 2013 1888 PaeTec Communications, Inc.
18566 2065 1881 Covad Communications
36998 1861 1856 MOBITEL
8402 1745 1729 Corbina telecom

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
62719 UNALLOCATED 12.27.130.0/24 4323 Time Warner Telecom
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

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

Prefixes from private and non-routed address space (Global)
-----------------------------------------------------------

Prefix Origin AS Description
100.100.0.0/24 4847 China Networks Inter-Exchange

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

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

Network Origin AS Description
23.90.128.0/18 27418 OUTOFWALL INC.
23.90.192.0/18 36086 Broad Communications Technolo
23.91.0.0/19 40676 Psychz Networks
23.91.32.0/19 36315 Servpac Inc.
23.92.16.0/21 8001 Net Access Corporation
23.92.24.0/22 6939 Hurricane Electric
23.92.48.0/20 29761 OC3 Networks & Web Solutions,
23.92.64.0/24 54540 Incero LLC
23.92.65.0/24 54540 Incero LLC
23.92.66.0/24 54540 Incero LLC

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 /8:16 /9:11 /10:30 /11:93 /12:250
/13:479 /14:907 /15:1612 /16:12785 /17:6695 /18:11120
/19:22782 /20:32436 /21:35029 /22:49364 /23:43035 /24:247286
/25:822 /26:987 /27:465 /28:47 /29:78 /30:19
/31:0 /32:10

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

ASN No of nets Total ann. Description
18566 2016 2065 Covad Communications
36998 1826 1861 MOBITEL
6389 1714 3069 bellsouth.net, inc.
8402 1467 1745 Corbina telecom
22773 1327 2041 Cox Communications, Inc.
30036 1212 1349 Mediacom Communications Corp
11492 1181 1220 Cable One
1785 1085 2013 PaeTec Communications, Inc.
6983 1025 1152 ITC^Deltacom
7011 933 1176 Citizens Utilities

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

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

1:809 2:844 3:3 4:19 5:940 6:19
8:612 12:1894 13:2 14:870 15:11 16:3
17:11 18:19 20:18 23:377 24:1744 27:1563
31:1435 32:45 33:2 34:5 36:75 37:1865
38:898 39:4 40:179 41:3281 42:254 44:9
46:1967 47:4 49:665 50:840 52:12 54:37
55:7 57:26 58:1168 59:619 60:336 61:1414
62:1225 63:1991 64:4556 65:2310 66:4159 67:2063
68:1091 69:3301 70:863 71:496 72:2006 74:2544
75:329 76:304 77:1169 78:1057 79:626 80:1317
81:1023 82:646 83:582 84:580 85:1259 86:481
87:1049 88:558 89:1834 90:158 91:5620 92:606
93:1668 94:2021 95:1592 96:508 97:347 98:1041
99:44 100:29 101:598 103:3284 105:519 106:142
107:208 108:498 109:1878 110:962 111:1127 112:566
113:792 114:734 115:987 116:979 117:817 118:1121
119:1287 120:367 121:739 122:1870 123:1252 124:1387
125:1421 128:614 129:221 130:318 131:671 132:351
133:161 134:287 135:67 136:266 137:268 138:348
139:180 140:196 141:325 142:554 143:386 144:491
145:101 146:529 147:494 148:692 149:355 150:153
151:581 152:416 153:195 154:30 155:480 156:274
157:409 158:282 159:754 160:350 161:458 162:631
163:250 164:627 165:561 166:256 167:605 168:1032
169:125 170:1078 171:192 172:25 173:1603 174:522
175:499 176:1193 177:2131 178:1912 179:116 180:1529
181:705 182:1262 183:435 184:635 185:804 186:2479
187:1431 188:1892 189:1290 190:7086 192:6912 193:5703
194:4654 195:3571 196:1344 197:1006 198:4657 199:5448
200:6019 201:2597 202:8915 203:8912 204:4524 205:2620
206:2835 207:2901 208:4001 209:3621 210:2944 211:1556
212:2277 213:2057 214:920 215:100 216:5285 217:1650
218:623 219:312 220:1277 221:557 222:325 223:507


End of report
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