And 1 more
As the route collectors of RIPEstat see them
139 IPv4 prefixes covering 262,144 addresses, and 0 IPv6 prefixes
And 89 more
From bgp.tools
Location from GeoLite2 data created by MaxMind
From AbuseIPDB
# # 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. # NetRange: 198.21.0.0 - 198.21.7.255 CIDR: 198.21.0.0/21 NetName: SENDGRID-198-21-0-0-21 NetHandle: NET-198-21-0-0-1 Parent: NET198 (NET-198-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: SendGrid, Inc. (SENDG-12) RegDate: 2013-04-01 Updated: 2016-11-11 Comment: http://www.sendgrid.com Comment: Standard Support Hours - 7am - 7pm PST Ref: https://rdap.arin.net/registry/ip/198.21.0.0 OrgName: SendGrid, Inc. OrgId: SENDG-12 Address: Twilio, Inc. Address: 1801 California Street Address: Suite 500 City: Denver StateProv: CO PostalCode: 80202 Country: US RegDate: 2012-06-14 Updated: 2025-06-12 Comment: http://www.sendgrid.com Comment: Comment: (888) 985-8363 Comment: Support hours: M-F, 7a-7p Mountain Time. Ref: https://rdap.arin.net/registry/entity/SENDG-12 OrgAbuseHandle: ABUSE3074-ARIN OrgAbuseName: Abuse Desk OrgAbusePhone: +1-888-985-7363 OrgAbuseEmail: abuse@sendgrid.com OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE3074-ARIN OrgTechHandle: TALSM-ARIN OrgTechName: Talsma, Jack OrgTechPhone: +1-415-390-2337 OrgTechEmail: netops+arin@sendgrid.com OrgTechRef: https://rdap.arin.net/registry/entity/TALSM-ARIN OrgTechHandle: TSNO-ARIN OrgTechName: Twilio SendGrid Network Operations OrgTechPhone: +1-888-985-7363 OrgTechEmail: netops+arin@sendgrid.com OrgTechRef: https://rdap.arin.net/registry/entity/TSNO-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. #
From https://rdap.arin.net/registry/ip/198.21.0.0
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "198.21.0.0",
"length": 21
}
],
"endAddress": "198.21.7.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-01-06T14:38:26-05:00"
},
{
"eventAction": "registration",
"eventDate": "2019-04-17T17:55:32-04:00"
}
],
"handle": "TSNO-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/TSNO-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
},
{
"href": "https://whois.arin.net/rest/poc/TSNO-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1801 California Street\nSuite 500\nDenver\nCO\n80202\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Twilio SendGrid Network Operations"
],
[
"org",
{},
"text",
"Twilio SendGrid"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"netops+arin@sendgrid.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-888-985-7363"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-08-05T16:53:33-04:00"
},
{
"eventAction": "registration",
"eventDate": "2011-06-22T17:22:31-04:00"
}
],
"handle": "ABUSE3074-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ABUSE3074-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
},
{
"href": "https://whois.arin.net/rest/poc/ABUSE3074-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"Abuse desk is available M-F 7a-7p Mountain Time"
],
"title": "Registration Comments"
}
],
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "1800 California Street\nSuite 500\nDenver\nCO\n80202\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Abuse Desk"
],
[
"org",
{},
"text",
"Twilio SendGrid"
],
[
"kind",
{},
"text",
"group"
],
[
"email",
{},
"text",
"abuse@sendgrid.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-888-985-7363"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-09-14T16:52:10-04:00"
},
{
"eventAction": "registration",
"eventDate": "2021-11-18T12:53:31-05:00"
}
],
"handle": "TALSM-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/TALSM-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
},
{
"href": "https://whois.arin.net/rest/poc/TALSM-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "101 Spear St 5th floor\nSan Francisco\nCA\n94105\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Jack Talsma"
],
[
"n",
{},
"text",
[
"Talsma",
"Jack",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"netops+arin@sendgrid.com"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-415-390-2337"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-06-12T17:11:56-04:00"
},
{
"eventAction": "registration",
"eventDate": "2012-06-14T06:44:26-04:00"
}
],
"handle": "SENDG-12",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/SENDG-12",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
},
{
"href": "https://whois.arin.net/rest/org/SENDG-12",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"http://www.sendgrid.com\r",
"\r",
"(888) 985-8363\r",
"Support hours: M-F, 7a-7p Mountain Time."
],
"title": "Registration Comments"
}
],
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"SendGrid, Inc."
],
[
"adr",
{
"label": "Twilio, Inc.\n1801 California Street\nSuite 500\nDenver\nCO\n80202\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2016-11-11T13:15:30-05:00"
},
{
"eventAction": "registration",
"eventDate": "2013-04-01T10:49:18-04:00"
}
],
"handle": "NET-198-21-0-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/198.21.0.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
},
{
"href": "https://whois.arin.net/rest/net/NET-198-21-0-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.21.0.0"
}
],
"name": "SENDGRID-198-21-0-0-21",
"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/ip/198.21.0.0"
}
],
"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/ip/198.21.0.0"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "ip network",
"parentHandle": "NET-198-0-0-0-0",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"cidr0",
"arin_originas0"
],
"remarks": [
{
"description": [
"http://www.sendgrid.com",
"Standard Support Hours - 7am - 7pm PST"
],
"title": "Registration Comments"
}
],
"startAddress": "198.21.0.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
}