HomeASN LookupAS3257

AS3257 GTT-BACKBONE GTT Communications Inc.

🇺🇸

Org handle: ORG-GCI2-RIPE

GTT

RIPE NCCallocatedASPA Published
Announced Prefixes (BGP)
2,018total
1,948 IPv470 IPv6
IPv4 Addresses
Allocated (RIR)8.4M
Announced (BGP)9.7M
IPv6 Addresses
Allocated (RIR)6.9×10³⁰
Announced (BGP)8.2×10³⁰
Prefix Limit (IPv4)
10,000
Prefix Limit (IPv6)
500
Country
🇺🇸 US
RIR
RIPE NCC
Status
allocated
Allocated
1994-09-30

Routing hygiene

Score 51/100 · High risk
RPKI ROA coverage
46.9%
160 prefixes RPKI invalid
IRR route objects
78.3%
311 prefixes registered for another origin
Hijack signals
214
48 announced against others' ROAs, 166 own announced by others
Upstreams
26
diversity 75/100
  • 53% of announced prefixes (1073 of 2020) have no valid ROA, 160 of them RPKI invalid
  • Announces 48 prefixes that RPKI assigns to another network (possible hijack or misconfiguration)
  • 96 prefixes registered in IRR route objects for another active network and not authorized by a ROA
  • 166 prefixes of this ASN announced by another network against its ROAs
  • 22% of announced prefixes (439 of 2020) have no IRR route object for this ASN

Based on 2,020 announced prefixes, updated daily (2026-10-25). How the score works · RPKI explained

Listed on the threat map (2026-10-25)

Large hosting providers appear because attackers rent their servers, not necessarily because of the operator.

Announced Prefixes

(BGP)1,000 of 2,018
|
Prefix
RPKI
IRR
Last Seen
2.26.180.0/24MOAS
 Valid
RIPE
-
2.26.184.0/24MOAS
 Valid
RIPE
-
2.26.220.0/23
 Valid
RIPE
-
2.26.240.0/22MOAS
 Valid
RIPE
-
2.26.244.0/22MOAS
 Valid
RIPE
-
2.27.172.0/24
 Valid
RIPE
-
2.27.196.0/22MOAS
 Invalid--
2.27.218.0/23MOAS
 Valid
RIPE
-
2.27.220.0/23MOAS
 Valid
RIPE
-
2.27.222.0/23MOAS
 Valid
RIPE
-
1-10 of 1,000
1 / 100

Allocated Prefixes

(RIR)500
Prefix
Country
RIR
Status
2.56.236.0/22🇩🇪 DERIPENCCallocated
2.58.75.0/24🇩🇪 DERIPEassigned
5.83.96.0/21🇬🇧 GBRIPENCCallocated
5.178.16.0/21🇳🇱 NLRIPENCCallocated
5.180.4.0/22🇲🇩 MDRIPENCCallocated
5.252.77.0/24🇬🇧 GBRIPEassigned
5.253.202.0/24🇬🇧 GBRIPEassigned
31.58.131.0/24🇺🇸 USRIPEassigned
31.58.139.0/24🇺🇸 USRIPEassigned
31.58.169.0/24🇺🇸 USRIPEassigned
1-10 of 500
1 / 50

All 2,018 announced prefixes of AS3257 →

Upstream Providers(1)

ASNName
AS0Transit-free

Downstream Customers(134)

ASNName
AS559🇨🇭Switch SWITCH
AS835🇨🇦GOCODEIT-EDGE - GoCodeIT Inc
AS1213🇮🇪Asiera ASIERA TECHNOLOGY SERVICES CLG
AS2572🇺🇸MORENET - University of Missouri - dba the Missouri Research and Education Network (MOREnet)
AS2734🇺🇸CORESITE - CoreSite
AS3170🇬🇧VELOXSERV VeloxServ Communications Ltd
AS3291🇺🇸PSINet-Europe GTT Communications Inc.
AS3327🇳🇱CITIC CITIC Telecom CPC Netherlands B.V.
AS4181🇺🇸TDS-AS - TDS TELECOM
AS5405🇩🇪INTERDOTLINK Inter.link GmbH
AS6057🇺🇾AS6057 - Administracion Nacional de Telecomunicaciones
AS6667🇫🇮EUNET-FINLAND Elisa Oyj
AS7794🇨🇦EXECULINK - Execulink Telecom Inc.
AS8612🇮🇹TISCALI-IT Smeraldo S.p.A.
AS9829🇮🇳BSNL-NIB - National Internet Backbone
AS11260🇨🇦EASTLINK-HSI - EastLink
AS11600🇺🇸PARALLAX - Parallax Services LLC
AS12541🇪🇸LYNTIA_BB_AS LYNTIA NETWORKS S.A.
AS12735🇹🇷ASTurkNet TurkNet Iletisim Hizmetleri A.S.
AS12779🇮🇹ITGATE IT.Gate S.p.A.
AS12905🇸🇰ACS-SK-AS ACS spol. s r. o.
AS13576🇺🇸SDNW-13576 - SDN Communications
AS14103🇺🇸ACDNET-ASN1 - ACD.net
AS14807🇨🇦STORMWEB - StormWeb Canada Hosting Inc.
AS15146🇧🇸CABLEBAHAMAS - Cable Bahamas
AS15562🇳🇱SNIJDERS Job Snijders
AS17149🇬🇵GCN-AS - Global Caribbean Network
AS19651🇨🇦TTL-LTD - The Trusty Ledger Ltd.
AS20912🇮🇹ASN-PANSERVICE Giuliano Claudio Peritore trading as "Panservice s.a.s. di Cuseo Fabrizio & C."
AS21263🇩🇪TELEDATA-AS TeleData GmbH
AS21430🇨🇿WIA-AS WIA spol. s.r.o.
AS21700🇺🇸NEPTUNE-NETWORKS - Neptune Networks, LLC
AS21738🇺🇸ROZINT - Rozint
AS21777🇺🇸MASSIVE-NETWORKS-21777 - Massive Networks, Inc.
AS24824🇦🇹WEISS-ASN Gebrueder-Weiss GmbH
AS24940🇩🇪HETZNER-AS Hetzner Online GmbH
AS25091🇨🇭IP-Max IP-Max SA
AS25369🇬🇧BANDWIDTH-AS Hydra Communications Ltd
AS28917🇱🇹Fiord-AS Fiord Networks, UAB
AS29208🇨🇿QUANTCOM-AS Quantcom, a.s.
AS29278🇭🇺RACKHOST-HU-AS Rackhost Zrt.
AS30823🇩🇪AUROLOGIC aurologic GmbH
AS31263🇮🇹MYNET-AS MYNET S.R.L.
AS31445🇵🇱Cloud-AS Fiberax sp. z o.o.
AS31570🇮🇹BENTEC-AS Benetton Group S.R.L.
AS32002🇺🇸RACKGENIUS - RackGenius
AS32097🇺🇸WII - WholeSale Internet, Inc.
AS32277🇨🇦TBAYTEL - TBayTel
AS33185🇨🇦HIVE-DATA-CENTER - Hive Data Center Inc.
AS33891🇩🇪CORE-BACKBONE Core-Backbone GmbH
AS33923🇵🇱ART-COM ART-COM Sp. z o.o.
AS34428🇮🇹EIGHTROUTE Giulio Lo Presti
AS35133🇳🇱ERANIUM Eranium B.V.
AS35661🇫🇷VIRTUASYS-EU VIRTUA SYSTEMS SAS
AS39175🇬🇧CONNECTIVE Connective Online Limited
AS39421🇫🇷SAPINET-AS Sapinet SAS
AS39526🇯🇴MAO Mohammad Ali Obeidat
AS39878🇦🇹RAUTER-AS Peter Rauter GmbH
AS40994🇦🇹Alwyzon Hohl IT e.U.
AS41327🇮🇹FIBERTELECOM-AS Fiber Telecom S.p.A.
AS41436🇺🇸CloudWebManage-EU Kamatera Inc
AS42184🇩🇪AS-TKRZ TKRZ Stadtwerke GmbH
AS44384🇮🇪crossan Crossan CableComm Ltd
AS46832🇺🇸UNIVERSITY-OF-MISSOURI-SYSTEM-INTER-CAMPUS-NETWORK - University of Missouri - dba the Missouri Research and Education Network (MOREnet)
AS47160🇫🇷MOJI MOJI SAS
AS48448🇸🇪EMBARK-INFRA Embark Studios AB
AS48638🇧🇪CRONOS Cronos NV
AS49935🇧🇪SmartEye SmartEye B.V
AS50124🇫🇷EASIO-COM EASIO-COM SASU
AS50629🇩🇪LWLCOM LWLcom GmbH
AS50666🇵🇹LIGAT LigaT Telecom Sociedade Unipessoal LDA
AS52025🇬🇧PARADOXNETWORKS-LIMITED ParadoxNetworks Limited
AS53764🇵🇷DMWIRELESS - DM Wireless LLC
AS55784🇳🇴AU-SYD-MARLINK-MSS - MARLINK AU-SYD
AS56595🇬🇧FLUENCY Commsworld Ltd
AS58007🇬🇧Witine Witine Limited
AS58212🇩🇪DATAFOREST dataforest GmbH
AS59827🇧🇪Futureweb-AS Futureweb BVBA
AS60092🇧🇬FIXITY FIXITY LLC
AS60132🇫🇷ZOREOLE-AS Zoreole Group SARL
AS60503🇧🇷FNXTEC FNX Tecnologia LTDA
AS61049🇬🇧EXASCALE Exascale Ltd
AS61429🇳🇱AS-CASTOR Castor Marine B.V.
AS61573🇧🇷AS61573 - IP TELECOM
AS62000🇫🇷AS62000 SERVERD SAS
AS62523🇺🇸CIRBN-LLC - CIRBN, LLC
AS63356🇨🇦TINUUM-NETWORKS-INC - Tinuum Networks Inc
AS131314🇭🇰CBC-AS-AP - CBC Tech International Limited
AS141754🇵🇭EVSI-AS-AP - Emapta Versatile Services Inc
AS196881🇬🇧LIBERTY-AS Liberty-izone Ltd
AS197883🇫🇷ASN-FR-SERINYA Serinya Telecom SAS
AS199081🇬🇷LANCOM Lancom Ltd.
AS200032🇩🇪rosenberger-hft-as Rosenberger Hochfrequenztechnik GmbH trading as Rosenberger Hochfrequenztechnik GmbH & Co. KG
AS200462🇩🇪AS-ETH Lennart Seitz trading as "ETH-Services"
AS201136🇪🇸AGLZ Agiliza Solutions SL
AS202142🇺🇸PACKETHARBOR PacketHarbor LLC
AS203410🇨🇾COLOBIX COLOBIX LTD
AS204126🇵🇱NET-KOMP NET-KOMP Sp. z o.o.
AS204548🇺🇸CLOUDWEBMANAGE-IL-FR Kamatera Inc
AS206075🇩🇪HOLLANDER-JACOBSEN Hollander & Jacobsen UG (haftungsbeschraenkt)
AS206082🇩🇰DANISH-CROWN-AS Danish Crown A/S
AS206375🇹🇷NETSPEED NETSPEED INTERNET A.S.
AS206383🇧🇬VOXLAN-AS VOXLAN LTD.
AS206600🇱🇻mfalv Ministry of foreign affairs of the Republic of Latvia
AS206924🇬🇧BENJOJONET Ben Cartwright-Cox
AS207995🇬🇧LightningFibre LF Holdco 2 Limited
AS208374🇱🇺LU-CIX-2 LU-CIX Management G.I.E.
AS209162🇬🇷INTERNETHELLAS-ASN INTERNET HELLAS LP
AS209532🇫🇷OPTEAM-IP INFORMATIQUE MAINTENANCE SERVICES SAS
AS210083🇧🇿Privex Privex Inc.
AS210329🇺🇸CloudWebManage-UK-1 Kamatera Inc
AS210457🇬🇧KYONIX Kyonix Networks Limited
AS211757🇮🇸PANASCAIS Panascais ehf.
AS212027🇬🇧PebbleHost PebbleHost Ltd
AS212683🇬🇧OLILO-AS Olilo UK & Ireland Ltd.
AS213622🇦🇪FALCON Falcon FZE LLC
AS214329🇸🇦BGP-Network BGP Network LLC
AS215248🇳🇱BastiaanBrink Bastiaan Mathijs Brink
AS215541🇩🇰AS-KRUSESEC Peter Kruse
AS215728🇺🇸CloudWebManage Kamatera Inc
AS216096🇦🇩SECUREPEAK Alex Terrats Ciberseguretat SLU
AS394177🇺🇸SHIFT-HOSTING-LLC - SHIFT HOSTING LLC
AS394437🇺🇸PSLIGHTWAVE - PS Lightwave
AS396064🇺🇸BASTIAAN MATHIJS BRINK - H2 Technologies LLC
AS396998🇺🇸PATH-NETWORK - Path Network, Inc.
AS397700🇺🇸LXXIX-PROJECT-LAB-01 - LXXIX Project Lab LLC
AS399004🇺🇸COUNTERPATH-BOSTON - Counterpath, LLC
AS399065🇺🇸DEFASTLINK - Dixie EPA
AS399486🇨🇦VIRTUO - 12651980 CANADA INC.
AS400554🇺🇸STRICITY - Stricity LLC
AS401896🇺🇸MISIU-USA - MISIU LLC
AS402000🇨🇦ATWAB-INC - Atwab Inc.
AS402063🇺🇸XANTIUM-AS-01 - XANTIUM CONTRACTCO LLC
AS402338🇺🇸BRINKLINK - BrinkLink

BGP Neighbours

(seen in AS paths)

Upstreams (24)

Networks AS3257 hands its own prefixes to: transit providers, or peers at an exchange.

  • AS1299TWELVE99 Arelion Sweden AB665
  • AS12956TELXIUS TELEFONICA GLOBAL SOLUTIONS SL562
  • AS3356Level 3 Parent537
  • AS6204ZET NET INTERKVM HOST115
  • AS2497Internet Initiative Japan48
  • AS23520Columbus Networks USA46
  • AS4230CLARO S.A31
  • AS9002RETN Limited9
  • AS4637Telstra Global8
  • AS58057SECUREBIT8
  • AS6762SEABONE NET TELECOM ITALIA SPARKLE S.P.A6
  • AS58453China Mobile International Limited6
  • AS6768EUROTEL "EUROTELE PLUS"5
  • AS8966Etisalat EMIRATES TELECOMMUNICATIONS GROUP COMPANY (ETISALAT GROUP) PJSC5
  • AS24961MYLOC WIIT3
  • AS2516KDDI CORPORATION2
  • AS7474SingTel Optus Pty2
  • AS30844LIQUID Telecommunications2
  • AS3303SWISSCOM (Schweiz)1
  • AS3320DTAG Deutsche Telekom1
  • AS6453TATA COMMUNICATIONS (AMERICA)1
  • AS6939Hurricane Electric1
  • AS20055Wholesail Networks1
  • AS29680VOZTELECOM Gamma Operadora De Comunicaciones S.A1

Downstreams (100 of 1,180)

Networks whose own prefixes AS3257 passes on: usually its customers.

  • AS7155ViaSat1,998
  • AS22773Cox Communications1,493
  • AS34984TELLCOM Superonline Iletisim Hizmetleri A.S823
  • AS11664Techtel LMDS Comunicaciones Interactivas S.A518
  • AS7459Grande Communications Networks452
  • AS62240Clouvider Limited447
  • AS7029Windstream Communications417
  • AS18779EGIHosting400
  • AS40676Psychz Networks398
  • AS137409GSL Networks Pty391
  • AS6079RCN378
  • AS9498BHARTI Airtel378
  • AS20473The Constant Company361
  • AS12586ASGHOSTNET GHOSTnet351
  • AS8452IDDQD332
  • AS55286B2 Net Solutions327
  • AS46844Sharktech312
  • AS12735ASTurkNet TurkNet Iletisim Hizmetleri A.S304
  • AS52468UFINET PANAMA S.A299
  • AS42689Glide Student & Residential Limited277
  • AS30058FDCservers.Net273
  • AS15830Equinix (EMEA) Acquisition Enterprises B.V219
  • AS13335Cloudflare208
  • AS14080Telmex Colombia S.A205
  • AS11404Wave Broadband199
  • AS14593Space Exploration Technologies Corporation199
  • AS32098Transtelco191
  • AS30041Race Tech188
  • AS23314Summit Broadband178
  • AS174Cogent Communications168
  • AS40065CNSERVERS157
  • AS31898Oracle Corporation154
  • AS5065Bunny Communications146
  • AS39855MOD EU Mod Mission Critical142
  • AS46562Performive138
  • AS54103MOD Mission Critical137
  • AS16504Granite Telecommunications118
  • AS36884Wana Corporate Wana Corporate118
  • AS8903AS8903 LYNTIA NETWORKS S.A114
  • AS29802HIVELOCITY113
  • AS19773Motorola102
  • AS59371Dimension Network & Communication Limited100
  • AS7203Leaseweb USA98
  • AS15924BORUSANTELEKOM Vodafone Net Iletisim Hizmetler AS96
  • AS30036Mediacom Communications94
  • AS9009M247 Europe87
  • AS31727NODE4 Limited86
  • AS38195Superloop82
  • AS63023GTHost74
  • AS12389ROSTELECOM PJSC Rostelecom72
  • AS7979Servers.Com71
  • AS23470ReliableSite.Net71
  • AS25369BANDWIDTH Hydra Communications70
  • AS36352HostPapa69
  • AS9658Eastern Telecoms Phils67
  • AS400511Clearwave Communications65
  • AS139341ACE64
  • AS15735DATASTREAM NET GO P.L.C61
  • AS6752ANDORRA TELECOM, S.A.U58
  • AS855Bell Canada57
  • AS13768Aptum Technologies57
  • AS62874Web2Objects57
  • AS16863Home Telephone Company54
  • AS22742Connecticut Education Network54
  • AS29049Delta Telecom Delta Telecom53
  • AS49915MEGAPORT (UK) Limited53
  • AS62044ZSCALER EMEA Zscaler Switzerland53
  • AS138915Kaopu Cloud HK Limited53
  • AS12400PARTNER Communications52
  • AS40934Fortinet52
  • AS21859Zenlayer47
  • AS36454WHG DAL WHG Hosting Services47
  • AS12041Afilias46
  • AS16509Amazon.Com46
  • AS288ESA European Space Agency (ESA)44
  • AS19905Vercara44
  • AS25653FortressITX44
  • AS49765Comms365 Limited43
  • AS7488CNServer42
  • AS11608Accretive Networks42
  • AS51088A2B IP B.V42
  • AS58212DATAFOREST42
  • AS16552Tiggee41
  • AS36236NetActuate40
  • AS4181TDS TELECOM39
  • AS39686EUROFIBER Nederland BV39
  • AS48544TECNOADSL Tecnotel Servizi Tecnologici39
  • AS396356Latitude.Sh39
  • AS36007Kamatera38
  • AS141039PacketHub S.A38
  • AS398465Rackdog38
  • AS3991434 County Electric Power Association38
  • AS5645TekSavvy Solutions37
  • AS9038BAT AS9038 Al Bahrainia Al Urdunia Liltaknia Wa Alitisalat Plc37
  • AS13876FiberLight37
  • AS55232Zultys37
  • AS203346232WEB Proper Support LLP37
  • AS396998Path Network37
  • AS33576Digicel Jamaica35
  • AS36692Cisco OpenDNS34

Other adjacent networks (50 of 148)

Adjacent to AS3257 in the transit part of AS paths: peers, providers or customers.

  • AS37468Angola Cables Angola Cables880
  • AS1764NEXTLAYER Next Layer Telekommunikationsdienstleistungs Und Beratungs830
  • AS2914NTT America602
  • AS13786Seabras 1 USA430
  • AS61461Airtek Solutions C.A383
  • AS48237MOBILY Etihad Etisalat, A Joint Stock Company230
  • AS5405INTERDOTLINK Inter.Link181
  • AS7843Charter Communications96
  • AS10122NETSTAR (SG) PTE66
  • AS36944Ubuntunet Alliance For Research And Education Networking Ubuntunet Alliance For Research And Education Networking59
  • AS983Akari Networks38
  • AS39392SuperNetwork SH.Cz S.R.O38
  • AS52320GlobeNet Cabos Submarinos Colombia, S.A.S36
  • AS6461Zayo Bandwidth35
  • AS5715Inteliquent31
  • AS28458IENTC S DE RL DE CV30
  • AS4134No.31,Jin Rong Street29
  • AS30990DJIBOUTI TELECOM S.A. DJIBOUTI TELECOM S.A29
  • AS33891CORE BACKBONE Core Backbone29
  • AS25091IP Max IP Max28
  • AS21488EMPLOT26
  • AS1273IDDQD23
  • AS906DMIT Cloud Services20
  • AS23764CTGNet20
  • AS41327FIBERTELECOM Fiber Telecom S.P.A20
  • AS213753Interedge B.V19
  • AS50124EASIO COM EASIO COM SASU17
  • AS30823AUROLOGIC16
  • AS7018AT&T Enterprises15
  • AS21559OSNET15
  • AS9269Hong Kong Broadband Network14
  • AS6667EUNET FINLAND Elisa Oyj12
  • AS37271Workonline Communications(Pty) Workonline Communications(Pty)12
  • AS49581TUBE HOSTING Ferdinand Zink Trading Tube Hosting12
  • AS49127ASIMO Networks B.V11
  • AS63927RISE11
  • AS206075HOLLANDER JACOBSEN Hollander & Jacobsen UG (Haftungsbeschraenkt)11
  • AS3920PUSHPKT OU10
  • AS8529OMANTEL Zain Omantel International FZ10
  • AS24940HETZNER Online10
  • AS210321OPKM0 Operadors Quilometre Zero S.L10
  • AS701Verizon Business9
  • AS58511Anycast Global Backbone9
  • AS60132ZOREOLE Group SARL9
  • AS260GTT Americas8
  • AS4540SOGETEL8
  • AS24875NOVOSERVE B.V8
  • AS29551HGCOMP ASN Aixit8
  • AS216265ARISTO NET ARISTO NETWORKS8
  • AS6208FiberX7

Transfer History

Registry transfers of AS3257 between organisations.

1
ASPA
PublishedTransit-free, 134 downstreams
Authorized Upstream Providers
provider-as 0 (transit-free / no upstream)
Expires 2026-10-27
Listed as Upstream Provider by
134 ASNs
View full ASPA details →
Abuse Contact
External Links
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Learn more

API
Open
GEThttps://api.ipctl.io/v1/asn/3257

Returns ASN details, announced prefixes, and BGP routing data.

curl -s "https://api.ipctl.io/v1/asn/3257" | jq