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.

Tuesday, November 20, 2012

[bgp-stats] Routing Table Report - Japan view

* BGP Routing Table Analysis Reports *
Routing Table Report 04:00 +10GMT Wed 21 Nov, 2012

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

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

BGP routing table entries examined: 431954
Prefixes after maximum aggregation: 179805
Deaggregation factor: 2.40
Unique aggregates announced to Internet: 212793
Total ASes present in the Internet Routing Table: 42650
Prefixes per ASN: 10.13
Origin-only ASes present in the Internet Routing Table: 33840
Origin ASes announcing only one prefix: 15834
Transit ASes present in the Internet Routing Table: 5696
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: 1046
Unregistered ASNs in the Routing Table: 383
Number of 32-bit ASNs allocated by the RIRs: 3501
Number of 32-bit ASNs visible in the Routing Table: 3114
Prefixes from 32-bit ASNs in the Routing Table: 8500
Special use prefixes present in the Routing Table: 15
Prefixes being announced from unallocated address space: 149
Number of addresses announced to Internet: 2613168704
Equivalent to 155 /8s, 193 /16s and 202 /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: 151762

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

Prefixes being announced by APNIC Region ASes: 104139
Total APNIC prefixes after maximum aggregation: 32326
APNIC Deaggregation factor: 3.22
Prefixes being announced from the APNIC address blocks: 104966
Unique aggregates announced from the APNIC address blocks: 43136
APNIC Region origin ASes present in the Internet Routing Table: 4791
APNIC Prefixes per ASN: 21.91
APNIC Region origin ASes announcing only one prefix: 1245
APNIC Region transit ASes present in the Internet Routing Table: 788
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: 358
Number of APNIC addresses announced to Internet: 714395008
Equivalent to 42 /8s, 148 /16s and 205 /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: 155357
Total ARIN prefixes after maximum aggregation: 78437
ARIN Deaggregation factor: 1.98
Prefixes being announced from the ARIN address blocks: 156120
Unique aggregates announced from the ARIN address blocks: 70106
ARIN Region origin ASes present in the Internet Routing Table: 15308
ARIN Prefixes per ASN: 10.20
ARIN Region origin ASes announcing only one prefix: 5771
ARIN Region transit ASes present in the Internet Routing Table: 1595
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: 1087412352
Equivalent to 64 /8s, 208 /16s and 152 /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: 110207
Total RIPE prefixes after maximum aggregation: 57955
RIPE Deaggregation factor: 1.90
Prefixes being announced from the RIPE address blocks: 113000
Unique aggregates announced from the RIPE address blocks: 72911
RIPE Region origin ASes present in the Internet Routing Table: 16979
RIPE Prefixes per ASN: 6.66
RIPE Region origin ASes announcing only one prefix: 8154
RIPE Region transit ASes present in the Internet Routing Table: 2756
Average RIPE Region AS path length visible: 5.0
Max RIPE Region AS path length visible: 30
Number of RIPE region 32-bit ASNs visible in the Routing Table: 2021
Number of RIPE addresses announced to Internet: 648709920
Equivalent to 38 /8s, 170 /16s and 135 /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: 44151
Total LACNIC prefixes after maximum aggregation: 8767
LACNIC Deaggregation factor: 5.04
Prefixes being announced from the LACNIC address blocks: 47707
Unique aggregates announced from the LACNIC address blocks: 22889
LACNIC Region origin ASes present in the Internet Routing Table: 1711
LACNIC Prefixes per ASN: 27.88
LACNIC Region origin ASes announcing only one prefix: 487
LACNIC Region transit ASes present in the Internet Routing Table: 329
Average LACNIC Region AS path length visible: 4.7
Max LACNIC Region AS path length visible: 24
Number of LACNIC region 32-bit ASNs visible in the Routing Table: 712
Number of LACNIC addresses announced to Internet: 119463200
Equivalent to 7 /8s, 30 /16s and 221 /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: 9484
Total AfriNIC prefixes after maximum aggregation: 2266
AfriNIC Deaggregation factor: 4.19
Prefixes being announced from the AfriNIC address blocks: 10012
Unique aggregates announced from the AfriNIC address blocks: 3621
AfriNIC Region origin ASes present in the Internet Routing Table: 572
AfriNIC Prefixes per ASN: 17.50
AfriNIC Region origin ASes announcing only one prefix: 177
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: 42887168
Equivalent to 2 /8s, 142 /16s and 104 /24s
Percentage of available AfriNIC address space announced: 42.6

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 2954 11557 898 Korea Telecom (KIX)
17974 2430 826 46 PT TELEKOMUNIKASI INDONESIA
7545 1787 301 89 TPG Internet Pty Ltd
4755 1622 375 159 TATA Communications formerly
9829 1409 1154 41 BSNL National Internet Backbo
9583 1219 92 530 Sify Limited
4808 1206 2090 331 CNCGROUP IP network: China169
7552 1140 1062 11 Vietel Corporation
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 3202 992 191 Windstream Communications Inc
6389 3153 3720 151 bellsouth.net, inc.
18566 2084 382 180 Covad Communications
22773 1938 2929 126 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
20115 1683 1606 628 Charter Communications
4323 1587 1153 392 Time Warner Telecom
30036 1360 283 764 Mediacom Communications Corp
7018 1280 10276 852 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 1800 544 16 Corbina telecom
12479 849 777 64 Uni2 Autonomous System
34984 840 210 207 BILISIM TELEKOM
13188 732 94 130 Educational Network
31148 731 37 9 FreeNet ISP
6830 716 2313 435 UPC Distribution Services
20940 710 228 548 Akamai Technologies European
58113 602 67 365 LIR DATACENTER TELECOM SRL
2118 595 97 14 EUnet/RELCOM Autonomous Syste
8551 594 364 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 2260 386 205 TVCABLE BOGOTA
28573 2174 1285 66 NET Servicos de Comunicao S.A
7303 1668 1138 201 Telecom Argentina Stet-France
6503 1535 435 67 AVANTEL, S.A.
8151 1479 3044 354 UniNet S.A. de C.V.
27947 731 77 93 Telconet S.A
3816 658 309 69 Empresa Nacional de Telecomun
11172 602 85 68 Servicios Alestra S.A de C.V
18881 594 716 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 872 275 36 LINKdotNET AS number
36998 772 48 3 MOBITEL
6713 516 650 19 Itissalat Al-MAGHRIB
8452 454 958 13 TEDATA
24835 289 80 8 RAYA Telecom - Egypt
3741 268 906 225 The Internet Solution
12258 194 28 66 Vodacom Internet Company
15706 191 32 6 Sudatel Internet Exchange Aut
29975 191 667 21 Vodacom
16637 181 697 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 3202 992 191 Windstream Communications Inc
6389 3153 3720 151 bellsouth.net, inc.
4766 2954 11557 898 Korea Telecom (KIX)
17974 2430 826 46 PT TELEKOMUNIKASI INDONESIA
10620 2260 386 205 TVCABLE BOGOTA
28573 2174 1285 66 NET Servicos de Comunicao S.A
18566 2084 382 180 Covad Communications
22773 1938 2929 126 Cox Communications, Inc.
1785 1931 678 126 PaeTec Communications, Inc.
8402 1800 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
6389 3153 3002 bellsouth.net, inc.
17974 2430 2384 PT TELEKOMUNIKASI INDONESIA
28573 2174 2108 NET Servicos de Comunicao S.A
4766 2954 2056 Korea Telecom (KIX)
10620 2260 2055 TVCABLE BOGOTA
18566 2084 1904 Covad Communications
22773 1938 1812 Cox Communications, Inc.
1785 1931 1805 PaeTec Communications, Inc.
8402 1800 1784 Corbina telecom
7545 1787 1698 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
41.222.80.0/21 37110 Moztel LDA

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
/13:478 /14:853 /15:1553 /16:12434 /17:6537 /18:10885
/19:21391 /20:30752 /21:32781 /22:43487 /23:40494 /24:226404
/25:1197 /26:1535 /27:721 /28:16 /29:22 /30:4
/31:0 /32:19

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

ASN No of nets Total ann. Description
7029 2641 3202 Windstream Communications Inc
18566 2034 2084 Covad Communications
6389 1783 3153 bellsouth.net, inc.
8402 1518 1800 Corbina telecom
30036 1276 1360 Mediacom Communications Corp
22773 1270 1938 Cox Communications, Inc.
11492 1145 1180 Cable One
6503 1053 1535 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)
----------------------------------------------

1:646 2:782 3:1 4:13 5:639 6:3
8:485 12:1960 13:3 14:695 15:11 16:3
17:6 20:27 23:213 24:1780 27:1415 31:1278
32:54 33:2 34:2 36:7 37:1056 38:845
39:2 40:140 41:2598 42:179 44:3 46:1664
47:2 49:511 50:608 52:12 54:27 55:3
57:28 58:1060 59:545 60:235 61:1284 62:935
63:2023 64:4336 65:2196 66:4513 67:2097 68:1162
69:3231 70:927 71:556 72:1894 74:2618 75:484
76:300 77:994 78:1004 79:504 80:1229 81:985
82:621 83:538 84:524 85:1158 86:518 87:957
88:350 89:1744 90:300 91:5349 92:587 93:1544
94:1805 95:1411 96:413 97:323 98:970 99:40
100:31 101:292 103:1802 105:514 106:119 107:203
108:480 109:1647 110:832 111:978 112:436 113:736
114:686 115:901 116:888 117:773 118:956 119:1255
120:364 121:677 122:1729 123:1168 124:1334 125:1285
128:559 129:201 130:292 131:664 132:314 133:143
134:256 135:62 136:218 137:240 138:337 139:176
140:505 141:290 142:499 143:366 144:492 145:85
146:528 147:265 148:739 149:327 150:155 151:218
152:450 153:183 154:22 155:432 156:227 157:370
158:278 159:669 160:337 161:414 162:370 163:190
164:581 165:450 166:478 167:561 168:974 169:130
170:921 171:148 172:7 173:1702 174:646 175:454
176:744 177:1487 178:1669 180:1382 181:172 182:1098
183:296 184:632 185:74 186:2069 187:1413 188:1766
189:1610 190:5854 192:6052 193:5420 194:4266 195:3594
196:1243 197:267 198:3932 199:5110 200:6007 201:1971
202:8788 203:8701 204:4432 205:2539 206:2769 207:2813
208:4086 209:3614 210:2881 211:1525 212:2125 213:1867
214:872 215:75 216:5190 217:1594 218:578 219:311
220:1257 221:531 222:337 223:413

End of report
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