Whois & RDAP Lookup
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IP Geolocation RDAPIP Range81.28.12.0 - 81.28.15.255
Handle81.28.12.0 - 81.28.15.255
NameLU-GCORELABS-20020416
TypeALLOCATED PA
CountryUS
HolderGCL1-MNT
Registered2021-03-23 15:29 UTC
Updated2026-02-12 14:08 UTC
RegistrantGCL1-MNT
Admin ContactLIR Admin
Phone+35220880507
AddressG-Core Labs S.A., 2 Rue Edmond Reuter, 5326 Contern
Tech ContactLIR Admin
Phone+35220880507
AddressG-Core Labs S.A., 2 Rue Edmond Reuter, 5326 Contern
Abuse Contact[email protected]
Statusactive
Registry RDAPhttps://rdap.db.ripe.net
Raw WHOIS response
% This is the RIPE Database query service. % The objects are in RPSL format. % % The RIPE Database is subject to Terms and Conditions. % See https://docs.db.ripe.net/terms-conditions.html % Note: this output has been filtered. % To receive output for a database update, use the "-B" flag. % Information related to '81.28.12.0 - 81.28.15.255' % Abuse contact for '81.28.12.0 - 81.28.15.255' is '[email protected]' inetnum: 81.28.12.0 - 81.28.15.255 netname: LU-GCORELABS-20020416 country: US geofeed: https://geofeed.gcore.lu/IP-Range.csv org: ORG-WIG6-RIPE admin-c: LA5122-RIPE tech-c: LA5122-RIPE status: ALLOCATED PA mnt-by: GCL1-MNT mnt-by: RIPE-NCC-HM-MNT created: 2021-03-23T15:29:53Z last-modified: 2026-02-12T14:08:20Z source: RIPE organisation: ORG-WIG6-RIPE org-name: G-Core Labs S.A. country: LU reg-nr: B184832 org-type: LIR address: 2-4, rue Edmond Reuter address: L-5326 address: Contern address: LUXEMBOURG phone: +375293666245 abuse-c: AC23417-RIPE mnt-ref: GCL1-MNT mnt-ref: RIPE-NCC-HM-MNT mnt-by: GCL1-MNT mnt-by: RIPE-NCC-HM-MNT created: 2012-12-05T13:21:56Z last-modified: 2026-05-13T07:34:33Z source: RIPE # Filtered person: LIR Admin address: G-Core Labs S.A. address: 2 Rue Edmond Reuter address: 5326 Contern phone: +35220880507 nic-hdl: LA5122-RIPE mnt-by: GCL1-MNT created: 2012-12-05T15:05:34Z last-modified: 2023-07-17T19:38:48Z source: RIPE # Filtered % Information related to '81.28.12.0/24AS199524' route: 81.28.12.0/24 descr: GCL-81-28-12-0-24 origin: AS199524 mnt-by: GCL1-MNT created: 2021-03-23T16:29:00Z last-modified: 2021-03-23T16:29:00Z source: RIPE % This query was served by the RIPE Database Query Service version 1.123 (BUSA) % Query time: 746 msec % WHEN: Wed Jul 29 00:16:38 UTC 2026
Raw RDAP JSON (registry) https://rdap.db.ripe.net
{
"cidr0_cidrs": [
{
"length": 22,
"v4prefix": "81.28.12.0"
}
],
"country": "US",
"endAddress": "81.28.15.255",
"entities": [
{
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"links": [
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"href": "https://rdap.db.ripe.net/entity/GCL1-MNT",
"rel": "self",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"value": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity",
"roles": [
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],
"vcardArray": [
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[
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[
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{
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},
{
"href": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
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[
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[
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[
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{
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"links": [
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"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "http://www.ripe.net/data-tools/support/documentation/terms",
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"objectClassName": "entity",
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"vcardArray": [
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{
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"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
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[
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[
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},
{
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},
{
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}
],
"objectClassName": "entity",
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"individual"
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},
{
"handle": "LA5122-RIPE",
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"rel": "self",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"value": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"objectClassName": "entity",
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"fn",
{},
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[
"kind",
{},
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],
[
"adr",
{
"label": "G-Core Labs S.A.\n2 Rue Edmond Reuter\n5326 Contern"
},
"text",
[
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""
]
],
[
"tel",
{
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"text",
"+35220880507"
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],
"handle": "AC23417-RIPE",
"objectClassName": "entity",
"roles": [
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],
"vcardArray": [
"vcard",
[
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{},
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"4.0"
],
[
"fn",
{},
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"ABUSE CONTACT"
],
[
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{},
"text",
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],
[
"adr",
{
"label": "G-Core Labs S.A.\n2A Rue Albert Borschette\n1246 Luxembourg"
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"text",
[
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[
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{
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"text",
"[email protected]"
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],
"events": [
{
"eventAction": "registration",
"eventDate": "2021-03-23T15:29:53Z"
},
{
"eventAction": "last changed",
"eventDate": "2026-02-12T14:08:20Z"
}
],
"handle": "81.28.12.0 - 81.28.15.255",
"ipVersion": "v4",
"links": [
{
"href": "https://geofeed.gcore.lu/IP-Range.csv",
"rel": "geofeed",
"type": "application/geofeed+csv",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/81.28.12.0%20-%2081.28.15.255",
"rel": "rdap-up",
"type": "application/rdap+json",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-up/81.28.12.0%20-%2081.28.15.255?status=active",
"rel": "rdap-up rdap-active",
"type": "application/rdap+json",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-down/81.28.12.0%20-%2081.28.15.255",
"rel": "rdap-down",
"type": "application/rdap+json",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/81.28.12.0%20-%2081.28.15.255",
"rel": "rdap-top",
"type": "application/rdap+json",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-top/81.28.12.0%20-%2081.28.15.255?status=active",
"rel": "rdap-top rdap-active",
"type": "application/rdap+json",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "https://rdap.db.ripe.net/ips/rirSearch1/rdap-bottom/81.28.12.0%20-%2081.28.15.255",
"rel": "rdap-bottom",
"type": "application/rdap+json",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "https://rdap.db.ripe.net/ip/81.28.12.12",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
},
{
"href": "http://www.ripe.net/data-tools/support/documentation/terms",
"rel": "copyright",
"value": "http://www.ripe.net/data-tools/support/documentation/terms"
}
],
"name": "LU-GCORELABS-20020416",
"notices": [
{
"description": [
"This output has been filtered."
],
"title": "Filtered"
},
{
"description": [
"If you see inaccuracies in the results, please visit:"
],
"links": [
{
"href": "https://www.ripe.net/contact-form?topic=ripe_dbm\u0026show_form=true",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Objects returned came from source",
"RIPE"
],
"title": "Source"
},
{
"description": [
"This is the RIPE Database query service. The objects are in RDAP format."
],
"links": [
{
"href": "http://www.ripe.net/db/support/db-terms-conditions.pdf",
"rel": "terms-of-service",
"type": "application/pdf",
"value": "https://rdap.db.ripe.net/ip/81.28.12.12"
}
],
"title": "Terms and Conditions"
}
],
"objectClassName": "ip network",
"parentHandle": "0.0.0.0 - 255.255.255.255",
"port43": "whois.ripe.net",
"rdapConformance": [
"geofeed1",
"rirSearch1",
"ips",
"cidr0",
"rdap_level_0",
"nro_rdap_profile_0",
"redacted"
],
"redacted": [
{
"method": "removal",
"name": {
"description": "Personal e-mail information"
},
"prePath": "$.entities[?(@.handle=='LA5122-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"reason": {
"description": "Personal data"
}
},
{
"method": "removal",
"name": {
"description": "Personal e-mail information"
},
"prePath": "$.entities[?(@.handle=='ORG-WIG6-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"reason": {
"description": "Personal data"
}
},
{
"method": "removal",
"name": {
"description": "Personal e-mail information"
},
"prePath": "$.entities[?(@.handle=='AC23417-RIPE')].vcardArray[1][?(@[0]=='e-mail')]",
"reason": {
"description": "Personal data"
}
}
],
"startAddress": "81.28.12.0",
"status": [
"active"
],
"type": "ALLOCATED PA"
}Frequently asked questions
What is WHOIS?
WHOIS is a public directory that answers "who is responsible for this?" for domains, IP ranges and ASNs. It lists registration dates, the registrar, nameservers and contacts.
What is RDAP, and how does it differ?
RDAP is the modern replacement for WHOIS. It returns the same records in a structured, consistent format. We query RDAP first and fall back to classic WHOIS text when a registry has not adopted it yet.
What is the difference between a registrar and a registrant?
The registrar is the company you register and manage a domain through, such as xTom or GoDaddy. The registrant is the person or organization that actually holds the domain.
What are nameservers?
Nameservers answer DNS questions for a domain and decide which IP addresses the name resolves to. They also show which DNS provider the domain uses.
What is DNSSEC?
DNSSEC adds cryptographic signatures to DNS answers so they cannot be quietly altered in transit. "Signed" means the domain has it enabled, "unsigned" means it does not.
Why is the contact information redacted?
Privacy laws such as GDPR require registrars to hide most personal details in public records. The abuse contact is usually still shown, so a domain or network can be reported when something goes wrong.