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.

Sunday, November 18, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Mon 19 Nov, 2012

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

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

BGP routing table entries examined: 432518
Prefixes after maximum aggregation: 180107
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 212663
Total ASes present in the Internet Routing Table: 42626
Prefixes per ASN: 10.15
Origin-only ASes present in the Internet Routing Table: 33825
Origin ASes announcing only one prefix: 15820
Transit ASes present in the Internet Routing Table: 5681
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: 40
Max AS path prepend of ASN ( 22394) 36
Prefixes from unregistered ASNs in the Routing Table: 1036
Unregistered ASNs in the Routing Table: 373
Number of 32-bit ASNs allocated by the RIRs: 3498
Number of 32-bit ASNs visible in the Routing Table: 3120
Prefixes from 32-bit ASNs in the Routing Table: 8496
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 149
Number of addresses announced to Internet: 2612903564
Equivalent to 155 /8s, 189 /16s and 190 /24s
Percentage of available address space announced: 70.6
Percentage of allocated address space announced: 70.6
Percentage of available address space allocated: 100.0
Percentage of address space in use by end-sites: 93.9
Total number of prefixes smaller than registry allocations: 152217

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

Prefixes being announced by APNIC Region ASes: 104623
Total APNIC prefixes after maximum aggregation: 32659
APNIC Deaggregation factor: 3.20
Prefixes being announced from the APNIC address blocks: 105453
Unique aggregates announced from the APNIC address blocks: 43270
APNIC Region origin ASes present in the Internet Routing Table: 4791
APNIC Prefixes per ASN: 22.01
APNIC Region origin ASes announcing only one prefix: 1245
APNIC Region transit ASes present in the Internet Routing Table: 784
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: 362
Number of APNIC addresses announced to Internet: 714064064
Equivalent to 42 /8s, 143 /16s and 192 /24s
Percentage of available APNIC address space announced: 83.5

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: 155298
Total ARIN prefixes after maximum aggregation: 78431
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 156076
Unique aggregates announced from the ARIN address blocks: 69986
ARIN Region origin ASes present in the Internet Routing Table: 15294
ARIN Prefixes per ASN: 10.21
ARIN Region origin ASes announcing only one prefix: 5758
ARIN Region transit ASes present in the Internet Routing Table: 1594
Average ARIN Region AS path length visible: 4.1
Max ARIN Region AS path length visible: 40
Number of ARIN region 32-bit ASNs visible in the Routing Table: 17
Number of ARIN addresses announced to Internet: 1087296640
Equivalent to 64 /8s, 206 /16s and 212 /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: 110149
Total RIPE prefixes after maximum aggregation: 57906
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 112954
Unique aggregates announced from the RIPE address blocks: 72837
RIPE Region origin ASes present in the Internet Routing Table: 16968
RIPE Prefixes per ASN: 6.66
RIPE Region origin ASes announcing only one prefix: 8150
RIPE Region transit ASes present in the Internet Routing Table: 2748
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 28
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2018
Number of RIPE addresses announced to Internet: 648669988
Equivalent to 38 /8s, 169 /16s and 235 /24s
Percentage of available RIPE address space announced: 94.3

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: 44328
Total LACNIC prefixes after maximum aggregation: 8781
LACNIC Deaggregation factor: 5.05
Prefixes being announced from the LACNIC address blocks: 47852
Unique aggregates announced from the LACNIC address blocks: 22830
LACNIC Region origin ASes present in the Internet Routing Table: 1711
LACNIC Prefixes per ASN: 27.97
LACNIC Region origin ASes announcing only one prefix: 489
LACNIC Region transit ASes present in the Internet Routing Table: 331
Average LACNIC Region AS path length visible: 4.5
Max LACNIC Region AS path length visible: 21
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 717
Number of LACNIC addresses announced to Internet: 119476008
Equivalent to 7 /8s, 31 /16s and 15 /24s
Percentage of available LACNIC address space announced: 71.2

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: 9508
Total AfriNIC prefixes after maximum aggregation: 2276
AfriNIC Deaggregation factor: 4.18
Prefixes being announced from the AfriNIC address blocks: 10034
Unique aggregates announced from the AfriNIC address blocks: 3610
AfriNIC Region origin ASes present in the Internet Routing Table: 567
AfriNIC Prefixes per ASN: 17.70
AfriNIC Region origin ASes announcing only one prefix: 178
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: 43096320
Equivalent to 2 /8s, 145 /16s and 153 /24s
Percentage of available AfriNIC address space announced: 42.8

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 2958 11557 898 Korea Telecom (KIX)
17974 2421 826 46 PT TELEKOMUNIKASI INDONESIA
7545 1790 301 88 TPG Internet Pty Ltd
4755 1616 375 159 TATA Communications formerly
9829 1411 1155 42 BSNL National Internet Backbo
9583 1217 92 529 Sify Limited
7552 1141 1062 11 Vietel Corporation
4808 1112 2057 316 CNCGROUP IP network: China169
24560 1040 385 165 Bharti Airtel Ltd., Telemedia
9498 1021 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
7029 3203 992 191 Windstream Communications Inc
6389 3157 3721 155 bellsouth.net, inc.
18566 2084 382 180 Covad Communications
22773 1943 2931 129 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
20115 1680 1601 633 Charter Communications
4323 1586 1153 392 Time Warner Telecom
30036 1363 284 766 Mediacom Communications Corp
7018 1278 10275 854 AT&T WorldNet Services
7011 1222 334 692 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 1765 544 16 Corbina telecom
12479 854 777 64 Uni2 Autonomous System
34984 840 210 207 BILISIM TELEKOM
31148 731 37 9 FreeNet ISP
13188 726 93 130 Educational Network
20940 713 230 551 Akamai Technologies European
6830 712 2313 435 UPC Distribution Services
2118 691 97 14 EUnet/RELCOM Autonomous Syste
58113 602 67 365 LIR DATACENTER TELECOM SRL
8551 596 364 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 2257 385 208 TVCABLE BOGOTA
28573 2152 1285 65 NET Servicos de Comunicao S.A
7303 1668 1138 201 Telecom Argentina Stet-France
8151 1602 3044 356 UniNet S.A. de C.V.
6503 1536 435 67 AVANTEL, S.A.
27947 748 77 92 Telconet S.A
3816 656 309 69 Empresa Nacional de Telecomun
11172 600 85 68 Servicios Alestra S.A de C.V
18881 587 716 18 Global Village Telecom
22047 579 326 15 VTR PUNTO NET S.A.

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 868 274 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
8452 527 958 13 TEDATA
6713 516 650 19 Itissalat Al-MAGHRIB
24835 289 80 8 RAYA Telecom - Egypt
3741 268 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
29975 191 667 21 Vodacom
15706 190 32 6 Sudatel Internet Exchange Aut
16637 180 697 88 MTN Network Solutions

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
7029 3203 992 191 Windstream Communications Inc
6389 3157 3721 155 bellsouth.net, inc.
4766 2958 11557 898 Korea Telecom (KIX)
17974 2421 826 46 PT TELEKOMUNIKASI INDONESIA
10620 2257 385 208 TVCABLE BOGOTA
28573 2152 1285 65 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
22773 1943 2931 129 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
7545 1790 301 88 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
6389 3157 3002 bellsouth.net, inc.
17974 2421 2375 PT TELEKOMUNIKASI INDONESIA
28573 2152 2087 NET Servicos de Comunicao S.A
4766 2958 2060 Korea Telecom (KIX)
10620 2257 2049 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
22773 1943 1814 Cox Communications, Inc.
1785 1931 1805 PaeTec Communications, Inc.
8402 1765 1749 Corbina telecom
7545 1790 1702 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
59530 UNALLOCATED 5.8.182.0/24 31261 GARS Telecom
61408 UNALLOCATED 5.56.0.0/21 174 Cogent Communication
59414 UNALLOCATED 5.102.144.0/21 15576 Nextra backbone in D
59395 UNALLOCATED 5.133.16.0/21 3549 Global Crossing
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

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
128.0.24.0/21 41794 Altline LLC
128.0.64.0/22 49466 Declic Telecom SAS
128.0.68.0/22 49466 Declic Telecom SAS
128.0.72.0/21 23456 32-bit ASN transition
128.0.80.0/20 52041 Timer LTD
128.0.104.0/23 51848 FOP Gabidullina Ludmila Nikol
128.0.106.0/24 23456 32-bit ASN transition
128.0.128.0/20 29285 AMT closed joint-stock compan
128.0.144.0/22 59675 >>UNKNOWN<<

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
41.220.94.0/23 42235 Intra Data Communication

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 /9:13 /10:29 /11:88 /12:243
/13:479 /14:851 /15:1553 /16:12438 /17:6535 /18:10884
/19:21360 /20:30747 /21:32844 /22:43393 /23:40498 /24:226274
/25:1364 /26:1698 /27:910 /28:179 /29:79 /30:17
/31:0 /32:24

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

ASN No of nets Total ann. Description
7029 2642 3203 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1783 3157 bellsouth.net, inc.
8402 1479 1765 Corbina telecom
30036 1279 1363 Mediacom Communications Corp
22773 1273 1943 Cox Communications, Inc.
11492 1145 1180 Cable One
6503 1054 1536 AVANTEL, S.A.
1785 1016 1931 PaeTec Communications, Inc.
7011 957 1222 Citizens Utilities

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

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

1:645 2:776 3:1 4:13 5:678 6:3
8:482 12:1958 13:3 14:694 15:11 16:3
17:6 20:27 23:213 24:1779 27:1412 31:1279
32:54 33:2 34:2 36:7 37:1043 38:840
39:2 40:139 41:2599 42:179 44:3 46:1664
47:2 49:498 50:606 52:12 54:27 55:3
57:28 58:1058 59:547 60:237 61:1284 62:924
63:2017 64:4335 65:2200 66:4520 67:2102 68:1162
69:3231 70:933 71:556 72:1895 74:2618 75:482
76:300 77:989 78:1003 79:503 80:1227 81:984
82:620 83:539 84:521 85:1155 86:516 87:958
88:348 89:1749 90:305 91:5340 92:586 93:1509
94:1797 95:1409 96:413 97:323 98:963 99:40
100:31 101:293 103:1799 105:521 106:119 107:203
108:479 109:1641 110:833 111:979 112:436 113:734
114:681 115:893 116:892 117:766 118:959 119:1226
120:363 121:674 122:1728 123:1168 124:1334 125:1285
128:563 129:201 130:292 131:651 132:311 133:143
134:256 135:62 136:211 137:238 138:339 139:175
140:501 141:292 142:497 143:366 144:490 145:84
146:528 147:265 148:735 149:328 150:150 151:215
152:450 153:183 154:21 155:432 156:229 157:369
158:278 159:670 160:337 161:414 162:370 163:190
164:580 165:447 166:480 167:561 168:973 169:130
170:922 171:148 172:7 173:1699 174:636 175:454
176:729 177:1460 178:1663 180:1382 181:172 182:1097
183:300 184:632 185:73 186:2091 187:1407 188:1767
189:1607 190:5826 192:6050 193:5410 194:4290 195:3669
196:1241 197:263 198:3931 199:5105 200:6013 201:1979
202:8811 203:8711 204:4432 205:2540 206:2766 207:2815
208:4073 209:3616 210:2883 211:1529 212:2129 213:1870
214:868 215:75 216:5189 217:1583 218:577 219:312
220:1259 221:531 222:337 223:410

End of report
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