Whois & RDAP Lookup
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RDAPHandleAS19551
NameINCAPSULA
HolderIncapsula Inc
Registered2011-01-12 21:26 UTC
Updated2012-02-24 14:44 UTC
RegistrantIncapsula Inc
AddressOne Curiosity Way, Suite 203, SAN MATEO, CA, 94403, United States
Admin ContactNetEng
OrganizationImperva inc.
Email[email protected]
Phone+1-650-345-9000
AddressOne Curiosity Way, Suite 203 San Mateo, CA 94403 US, San Mateo, CA, 94403, United States
Tech ContactNetEng
OrganizationImperva inc.
Email[email protected]
Phone+1-650-345-9000
AddressOne Curiosity Way, Suite 203 San Mateo, CA 94403 US, San Mateo, CA, 94403, United States
Abuse Contact[email protected]
Abuse Phone+1-650-345-9000
Statusactive
Registry RDAPhttps://rdap.arin.net
Raw WHOIS response
# # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # ASNumber: 19551 ASName: INCAPSULA ASHandle: AS19551 RegDate: 2011-01-12 Updated: 2012-02-24 Ref: https://rdap.arin.net/registry/autnum/19551 OrgName: Incapsula Inc OrgId: INCAP-5 Address: One Curiosity Way, Suite 203 City: SAN MATEO StateProv: CA PostalCode: 94403 Country: US RegDate: 2010-09-15 Updated: 2026-03-16 Ref: https://rdap.arin.net/registry/entity/INCAP-5 OrgNOCHandle: NOC33850-ARIN OrgNOCName: NOC OrgNOCPhone: +1-650-345-9000 OrgNOCEmail: [email protected] OrgNOCRef: https://rdap.arin.net/registry/entity/NOC33850-ARIN OrgRoutingHandle: NETEN40-ARIN OrgRoutingName: NetEng OrgRoutingPhone: +1-650-345-9000 OrgRoutingEmail: [email protected] OrgRoutingRef: https://rdap.arin.net/registry/entity/NETEN40-ARIN OrgAbuseHandle: ABUSE9265-ARIN OrgAbuseName: Abuse OrgAbusePhone: +1-650-345-9000 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE9265-ARIN OrgTechHandle: NETEN40-ARIN OrgTechName: NetEng OrgTechPhone: +1-650-345-9000 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/NETEN40-ARIN # # ARIN WHOIS data and services are subject to the Terms of Use # available at: https://www.arin.net/resources/registry/whois/tou/ # # If you see inaccuracies in the results, please report at # https://www.arin.net/resources/registry/whois/inaccuracy_reporting/ # # Copyright 1997-2026, American Registry for Internet Numbers, Ltd. # % Query time: 808 msec % WHEN: Thu Sep 24 14:48:01 UTC 2026
Raw RDAP JSON (registry) https://rdap.arin.net
{
"endAutnum": 19551,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-16T14:16:49-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-08-13T12:22:35-04:00"
}
],
"handle": "NETEN40-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NETEN40-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/19551"
},
{
"href": "https://whois.arin.net/rest/poc/NETEN40-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/19551"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"technical",
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "One Curiosity Way, Suite 203 San Mateo, CA 94403 US\nSan Mateo\nCA\n94403\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"NetEng"
],
[
"org",
{},
"text",
"Imperva inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-345-9000"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-18T09:16:22-04:00"
},
{
"eventAction": "registration",
"eventDate": "2025-03-18T13:50:07-04:00"
}
],
"handle": "ABUSE9265-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE9265-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/19551"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE9265-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/19551"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "One Curiosity Way, Suite 203 San Mateo, CA 94403 US\nSan Mateo\nCA\n94403\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Abuse"
],
[
"org",
{},
"text",
"Imperva inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-345-9000"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-16T14:16:38-04:00"
},
{
"eventAction": "registration",
"eventDate": "2024-08-13T12:18:06-04:00"
}
],
"handle": "NOC33850-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/NOC33850-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/19551"
},
{
"href": "https://whois.arin.net/rest/poc/NOC33850-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/19551"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "One Curiosity Way, Suite 203 San Mateo, CA 94403 US\nSan Mateo\nCA\n94403\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"NOC"
],
[
"org",
{},
"text",
"Imperva inc."
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-650-345-9000"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-03-16T14:27:01-04:00"
},
{
"eventAction": "registration",
"eventDate": "2010-09-15T00:00:00-04:00"
}
],
"handle": "INCAP-5",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/INCAP-5",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/19551"
},
{
"href": "https://whois.arin.net/rest/org/INCAP-5",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/19551"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"Incapsula Inc"
],
[
"adr",
{
"label": "One Curiosity Way, Suite 203\nSAN MATEO\nCA\n94403\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2012-02-24T09:44:34-05:00"
},
{
"eventAction": "registration",
"eventDate": "2011-01-12T16:26:45-05:00"
}
],
"handle": "AS19551",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/19551",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/19551"
},
{
"href": "https://whois.arin.net/rest/asn/AS19551",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/19551"
}
],
"name": "INCAPSULA",
"notices": [
{
"description": [
"By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/tou/",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/19551"
}
],
"title": "Terms of Service"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/19551"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"startAutnum": 19551,
"status": [
"active"
]
}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.