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AS25657
BASECAMP - Basecamp, LLC Announcing routesAS nameBASECAMP
OrganisationBasecamp, LLC
Registry (RIR)ARIN
HandleAS25657
RangeAS25657
Registered03 Feb 2011
Last changed05 Jun 2019
Abuse contact[email protected]
3IPv4 prefixes
0IPv6 prefixes
3Upstreams
0Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS23352 | SERVERCENTRAL - DEFT.COM | 502 |
| AS3257 | GTT-BACKBONE GTT Communications Inc. | 173 |
| AS286 | KPN GTT Communications Inc. | 1 |
Downstreams
None seen.
IPv4 prefixes (3)
RPKI-validate all prefixes of AS25657
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | Basecamp, LLC | SL-5 | 30 North Racine Avenue #200, Chicago, IL, 60607, United States | |
| technical, administrative, abuse, noc | Operations | OPERA630-ARIN | [email protected], +1-312-281-5333 | 137 N Oak Park Ave, Suite 208, Oak Park, IL, 60301, United States |
| technical, abuse, noc | Operations | OPERA630-ARIN | [email protected], +1-312-281-5333 | 137 N Oak Park Ave, Suite 208, Oak Park, IL, 60301, United States |
Raw registry response
{
"endAutnum": 25657,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-18T09:50:24-05:00"
},
{
"eventAction": "registration",
"eventDate": "2019-06-05T12:35:51-04:00"
}
],
"handle": "OPERA630-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/OPERA630-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/25657"
},
{
"href": "https://whois.arin.net/rest/poc/OPERA630-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/25657"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"administrative",
"abuse",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "137 N Oak Park Ave\nSuite 208\nOak Park\nIL\n60301\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Operations"
],
[
"org",
[],
"text",
"37signals, LLC"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-312-281-5333"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2019-06-05T12:43:31-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-01-06T14:24:06-05:00"
}
],
"handle": "SL-5",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/SL-5",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/25657"
},
{
"href": "https://whois.arin.net/rest/org/SL-5",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/25657"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Basecamp, LLC"
],
[
"adr",
{
"label": "30 North Racine Avenue #200\nChicago\nIL\n60607\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-11-18T09:50:24-05:00"
},
{
"eventAction": "registration",
"eventDate": "2019-06-05T12:35:51-04:00"
}
],
"handle": "OPERA630-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/OPERA630-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/25657"
},
{
"href": "https://whois.arin.net/rest/poc/OPERA630-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/25657"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"abuse",
"noc"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "137 N Oak Park Ave\nSuite 208\nOak Park\nIL\n60301\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Operations"
],
[
"org",
[],
"text",
"37signals, LLC"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-312-281-5333"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2019-06-05T12:44:17-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-02-02T15:08:20-05:00"
}
],
"handle": "AS25657",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/25657",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/25657"
},
{
"href": "https://whois.arin.net/rest/asn/AS25657",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/25657"
}
],
"name": "BASECAMP",
"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/25657"
}
],
"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/25657"
}
],
"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": 25657,
"status": [
"active"
]
}Results come from public internet registries and live global routing data. Results are cached for up to an hour. Lookups are logged with your IP address to prevent abuse — see our Privacy Policy.