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Spoofing Information for AS 174 (COGENT-174)

Spoofing status per IP block for last year of data

(Results for all dates also available.)
Spoof status key
receivedSpoofed packet was received.Pattern of tests from this IP block indicates a switch from allowing spoofing to blocking it.
rewrittenSpoofed packet was received, but the source address was changed en route.
blockedSpoofed packet was not received, but unspoofed packet was.
unknownNeither spoofed nor unspoofed packet was received.
IP blockLatest testSpoof
Private
Spoof
Routable
38.77.21.x/242023-05-18 02:40:34 GMTblockedblocked
38.87.14.x/242023-08-06 20:43:16 GMTrewrittenrewritten
38.88.11.x/242024-02-15 16:47:25 GMTblockedblocked
38.100.141.x/242023-11-09 14:15:11 GMTrewrittenblocked
38.104.7.x/242023-05-29 20:12:40 GMTblockedblocked
38.122.127.x/242023-06-21 20:04:54 GMTblockedblocked
50.7.187.x/242023-04-10 13:18:38 GMTblockedblocked
102.129.152.x/242023-09-02 11:00:03 GMTrewrittenrewritten
102.129.153.x/242024-01-21 12:00:05 GMTrewrittenrewritten
185.142.238.x/242023-02-23 06:16:16 GMTblockedblocked

Customers of AS 174 we have spoofer tests from

This is the list of directly connected customers of AS 174 from which we have received a spoofer test, ordered by the customer's ability to send spoofed packets and the number of prefixes of an inferred ingress ACL derived from prefix announcements for the customer recorded in the latest month of public BGP data. BCP-84 describes ingress ACLs as "the most bulletproof solution when done properly" and the "best fit ... when the configuration is not too dynamic, ... if the number of used prefixes is low." Further detail about the size and dynamism of an inferred ACL is available by following the History link for each AS.

ASNCountryNumber of Prefixes
in Customer Cone
Number of ASes
in Customer Cone
Recent
tests
Spoof
Routable
207176 (OPENFIBER)nld (Netherlands)70AS 207176 testsreceived
37371 (HORMUUD)som (Somalia)93AS 37371 testsreceived
134707 (RCC-AS-AP)phl (Philippines)103AS 134707 testsreceived
12183 (TALKIE-COMMUNICATIONS)usa (United States)110AS 12183 testsreceived
7131 (PTIPACIFICAINC-AS-AP)gum (Guam [US])191AS 7131 testsreceived
3920 (IMS-RTFM)hkg (Hong Kong)334AS 3920 testsreceived
20412 (CLARITY-TELECOM)usa (United States)402AS 20412 testsreceived
61461ven (Venezuela)5420AS 61461 testsreceived
3701 (NERONET)usa (United States)6813AS 3701 testsreceived
14282bra (Brazil)14349AS 14282 testsreceived
38235 (MEKONGNET-ADC-AS-AP)khm (Cambodia, Kingdom of)31127AS 38235 testsreceived
36947 (ALGTEL-AS)dza (Algeria)112422AS 36947 testsreceived
52551bra (Brazil)1616182AS 52551 testsreceived
35297 (DATALINE-AS)ukr (Ukraine)1895633AS 35297 testsreceived
16637 (MTNNS-AS)zaf (South Africa)2759357AS 16637 testsreceived
17494 (BTTB-AS-AP)bgd (Bangladesh)3699606AS 17494 testsreceived
60171 (AFRIX-AS)esp (Spain)3757309AS 60171 testsreceived
8452 (TE-AS)egy (Egypt)4719159AS 8452 testsreceived
30844 (LIQUID-AS)tza (Tanzania)534063537AS 30844 testsreceived
92 (CLARKSON-AS)usa (United States)20AS 92 testsblocked
21709 (IMPLEX-NET)usa (United States)20AS 21709 testsblocked
39875 (W3Z)gbr (United Kingdom)20AS 39875 testsblocked
206433 (SITAOnAir)nld (Netherlands)20AS 206433 testsblocked
263271bra (Brazil)20AS 263271 testsblocked
29449 (IP-TELECOM-AS)ita (Italy)30AS 29449 testsblocked
213230 (HETZNER-CLOUD2-AS)usa (United States)30AS 213230 testsblocked
2549mex (Mexico)40AS 2549 testsblocked
201019 (P4NET_POZ)pol (Poland)40AS 201019 testsblocked
204471ita (Italy)40AS 204471 testsblocked
270068per (Peru)40AS 270068 testsblocked
272022bra (Brazil)40AS 272022 testsblocked
2552 (WUSTL-ASN)usa (United States)50AS 2552 testsblocked
31919 (BRMEMC)usa (United States)60AS 31919 testsblocked
399820 (ATOMIC-NETWORKS-1)usa (United States)60AS 399820 testsblocked
5719 (SUNYSB)usa (United States)70AS 5719 testsblocked
55 (UPENN)usa (United States)81AS 55 testsblocked
25376 (NETNORTH-ASN)gbr (United Kingdom)101AS 25376 testsblocked
12876 (AS12876)nld (Netherlands)110AS 12876 testsblocked
397545 (AS-NSL-261)can (Canada)110AS 397545 testsblocked
42455 (Wi-Manx-AS)imn (Isle of Man)141AS 42455 testsblocked
49855 (PLUTEX)deu (Germany)152AS 49855 testsblocked
397031 (GALAXYGATE)usa (United States)161AS 397031 testsblocked
56550 (STELCORE)ita (Italy)170AS 56550 testsblocked
33983 (ARTMOTION-AS)alb (Albania)198AS 33983 testsblocked
3685 (BUFFALO-ASN)usa (United States)203AS 3685 testsblocked
12392 (ASBRUTELE)bel (Belgium)203AS 12392 testsblocked
25424 (INEXT-CZ)cze (Czech Republic)213AS 25424 testsblocked
10750 (MARK-TWAIN)usa (United States)220AS 10750 testsblocked
46632 (SOUTHWEST-ARKANSAS-TELEPHONE-COOPERATIVE)usa (United States)244AS 46632 testsblocked
15699 (AS_ADAM)esp (Spain)274AS 15699 testsblocked
8265 (FASTNET-BKB-ASN)ita (Italy)282AS 8265 testsblocked
62523 (CIRBN-LLC)usa (United States)286AS 62523 testsblocked
8399 (SEWAN-FR)fra (France)300AS 8399 testsblocked
22898 (ATLINK)usa (United States)313AS 22898 testsblocked
52210 (AsreTeleCoM-SP)can (Canada)333AS 52210 testsblocked
394996 (PAPERSPACE)usa (United States)340AS 394996 testsblocked
21472 (SERVERHOUSE)gbr (United Kingdom)385AS 21472 testsblocked
200019 (AlexHost)mda (Moldova, Republic of)420AS 200019 testsblocked
19165 (WEBPASS)usa (United States)431AS 19165 testsblocked
36007 (KAMATERA)ita (Italy)530AS 36007 testsblocked
1213 (HEANET)irl (Ireland)534AS 1213 testsblocked
21412 (CGATES-AS)ltu (Lithuania)621AS 21412 testsblocked
19318 (IS-AS-1)usa (United States)692AS 19318 testsblocked
8374 (PLUSNET)pol (Poland)7334AS 8374 testsblocked
12322 (PROXAD)fra (France)754AS 12322 testsblocked
201838 (ASN-COMMUNITYFIBRE)gbr (United Kingdom)850AS 201838 testsblocked
45267 (LIGHTWIRE-AS-AP)nzl (New Zealand)886AS 45267 testsblocked
8612 (TISCALI-IT)ita (Italy)8910AS 8612 testsblocked
5466 (EIRCOM)irl (Ireland)10015AS 5466 testsblocked
17511 (OPTAGE)jpn (Japan)1019AS 17511 testsblocked
13693 (NTS-ONLINE)usa (United States)11511AS 13693 testsblocked
46375 (AS-SONICTELECOM)usa (United States)11614AS 46375 testsblocked
8422 (NETCOLOGNE)deu (Germany)12232AS 8422 testsblocked
63949 (LINODE-AP)sgp (Singapore)1231AS 63949 testsblocked
2018 (TENET-1)zaf (South Africa)1286AS 2018 testsblocked
27446 (AS-ERCBB)usa (United States)13119AS 27446 testsblocked
39122 (BLACKNIGHT-AS)irl (Ireland)13520AS 39122 testsblocked
9063 (SAARGATE-AS)deu (Germany)13526AS 9063 testsblocked
803 (SASKTEL)can (Canada)15322AS 803 testsblocked
50266 (tmobile-thuis)nld (Netherlands)15723AS 50266 testsblocked
39138 (RRBONE)deu (Germany)1889AS 39138 testsblocked
9500 (VODAFONE-TRANSIT-AS)nzl (New Zealand)20938AS 9500 testsblocked
6128 (CABLE-NET-1)usa (United States)2242AS 6128 testsblocked
2200 (FR-RENATER)fra (France)23546AS 2200 testsblocked
7992 (COGECOWAVE)can (Canada)23726AS 7992 testsblocked
12337 (NORIS-NETWORK)deu (Germany)33730AS 12337 testsblocked
11776 (ATLANTICBB-JOHNSTOWN)usa (United States)34632AS 11776 testsblocked
5769 (VIDEOTRON)can (Canada)35826AS 5769 testsblocked
19108 (SUDDENLINK-COMMUNICATIONS)usa (United States)38178AS 19108 testsblocked
16276 (OVH)fra (France)38439AS 16276 testsblocked
30600 (AS-CMN)usa (United States)39958AS 30600 testsblocked
14265 (US-TELEPACIFIC)usa (United States)40440AS 14265 testsblocked
15704 (AS15704)esp (Spain)44661AS 15704 testsblocked
63023 (AS-GLOBALTELEHOST)deu (Germany)45121AS 63023 testsblocked
15576 (NTS)che (Switzerland)45388AS 15576 testsblocked
22047chl (Chile)4541AS 22047 testsblocked
13213 (UK2NET-AS)gbr (United Kingdom)5009AS 13213 testsblocked
15557 (LDCOMNET)fra (France)515101AS 15557 testsblocked
49981 (WorldStream)nld (Netherlands)72964AS 49981 testsblocked
56911 (ASN-WARIAN)ita (Italy)85022AS 56911 testsblocked
8881 (VERSATEL)deu (Germany)889215AS 8881 testsblocked
6503mex (Mexico)93022AS 6503 testsblocked
15164 (UPNLLC)usa (United States)1016162AS 15164 testsblocked
36352 (AS-COLOCROSSING)usa (United States)103926AS 36352 testsblocked
2860 (NOS_COMUNICACOES)prt (Portugal)109544AS 2860 testsblocked
36925 (ASMedi)mar (Morocco)126238AS 36925 testsblocked
4538 (ERX-CERNET-BKB)chn (China)126838AS 4538 testsblocked
9541 (CYBERNET-AP)pak (Pakistan)132032AS 9541 testsblocked
20055 (AS-WHOLESAIL)usa (United States)1438170AS 20055 testsblocked
24940 (HETZNER-AS)fin (Finland)147767AS 24940 testsblocked
33763 (Paratus-Telecom)ago (Angola)147897AS 33763 testsblocked
37084 (simbanet-tz)tza (Tanzania)151159AS 37084 testsblocked
136557 (HOST-AS-AP)aus (Australia)1598123AS 136557 testsblocked
28343bra (Brazil)1602165AS 28343 testsblocked
5650 (FRONTIER-FRTR)usa (United States)1761295AS 5650 testsblocked
1257 (SWIPNET)swe (Sweden)1798271AS 1257 testsblocked
8708 (RCS-RDS)rou (Romania)1911381AS 8708 testsblocked
43350 (NFORCE)nld (Netherlands)1952142AS 43350 testsblocked
852 (ASN852)can (Canada)2084285AS 852 testsblocked
23106bra (Brazil)2154439AS 23106 testsblocked
5416bhr (Bahrain)2564110AS 5416 testsblocked
29802 (HVC-AS)usa (United States)2616118AS 29802 testsblocked
8151mex (Mexico)321594AS 8151 testsblocked
18734mex (Mexico)5716189AS 18734 testsblocked
9009 (M247)usa (United States)5760152AS 9009 testsblocked
1680 (NV-ASN)isr (Israel)6091228AS 1680 testsblocked
6327 (SHAW)can (Canada)6177494AS 6327 testsblocked
3786 (LGDACOM)kor (South Korea)7427525AS 3786 testsblocked
20473 (AS-CHOOPA)usa (United States)77391363AS 20473 testsblocked
396356 (MAXIHOST)usa (United States)8744323AS 396356 testsblocked
577 (BACOM)can (Canada)10227915AS 577 testsblocked
4230bra (Brazil)119443493AS 4230 testsblocked
4837 (CHINA169-Backbone)chn (China)12172380AS 4837 testsblocked
2516 (KDDI)jpn (Japan)12257664AS 2516 testsblocked
2497 (IIJ)jpn (Japan)12698795AS 2497 testsblocked
60068 (CDN77)usa (United States)15389742AS 60068 testsblocked
52468cri (Costa Rica)155501838AS 52468 testsblocked
3303 (SWISSCOM)che (Switzerland)248812821AS 3303 testsblocked
812 (ROGERS-COMMUNICATIONS)can (Canada)262921234AS 812 testsblocked
4134 (CHINANET-BACKBONE)chn (China)26954857AS 4134 testsblocked
262589col (Colombia)278323656AS 262589 testsblocked
4657 (STARHUB-INTERNET)sgp (Singapore)305311370AS 4657 testsblocked
7922 (COMCAST-7922)usa (United States)319192511AS 7922 testsblocked
4788 (TMNET-AS-AP)mys (Malaysia)936239192AS 4788 testsblocked
4766 (KIXS-AS-KR)kor (South Korea)10722810331AS 4766 testsblocked
9498 (BBIL-AP)ind (India)15482917711AS 9498 testsblocked

Address Space Announcement History

The customer cone for 174 is too large for a prefix list to be useful.

Last Modified