Organization
TETRA TECH, INC.
TETRA-TECH
Location
Pasadena (Hastings Ranch)
California, United States (US)
Hostname
—
Geolocation
United States (US) United States
- Country
- United States (US)
- Region
- California
- City
- Pasadena (Hastings Ranch)
- Continent
- North America
- Coordinates
- 34.1506, -118.078 View on map ↗
Network Information
IP Range 198.163.176.0 – 198.163.178.255 CIDR 198.163.176.0/23, 198.163.178.0/24 Network Name TETRA-TECH Handle NET-198-163-176-0-1 Type DIRECT ALLOCATION Parent Network NET-198-0-0-0-0 Organization TETRA TECH, INC. Organization ID TETRA-15 Address 3475 E FOOTHILL BLVD., PASADENA, CA, 91107, United States Country United States (US) Registry ARIN Registered On Jun 08, 1994 Last Updated Dec 15, 2021 Status
active
ASN & Routing
Origin AS AS64204 AS Name TTEK-12 - TETRA TECH, INC., US Announced Prefix 198.163.178.0/24 AS Registry ARIN Prefix Country United States (US) Allocated 1994-06-08 RPKI Origin Not found (no ROA covers this prefix)
Reverse DNS
No PTR record is published for this address.
Abuse Contact
Raw RDAP Response
{
"arin_originas0_originautnums": [],
"cidr0_cidrs": [
{
"v4prefix": "198.163.176.0",
"length": 23
},
{
"v4prefix": "198.163.178.0",
"length": 24
}
],
"endAddress": "198.163.178.255",
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-06-25T07:49:18-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-03-19T12:21:11-04:00"
}
],
"handle": "LOMBA72-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/LOMBA72-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/poc/LOMBA72-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical",
"noc",
"routing",
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "8 Southwoods Blvd\n3rd floor\nAlbany\nNY\n12211\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Michael Lombardi"
],
[
"n",
{},
"text",
[
"Lombardi",
"Michael",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-518-368-6453"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-08T10:05:03-04:00"
},
{
"eventAction": "registration",
"eventDate": "2020-02-14T13:25:30-05:00"
}
],
"handle": "KOBAY18-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/KOBAY18-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/poc/KOBAY18-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"dns"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-08T15:21:22-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-03-21T16:33:55-04:00"
}
],
"handle": "HELMD8-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/HELMD8-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/poc/HELMD8-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"REDACTED"
],
[
"kind",
{},
"text",
"individual"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-24T07:49:33-04:00"
},
{
"eventAction": "registration",
"eventDate": "2021-04-06T12:02:17-04:00"
}
],
"handle": "LEVIN193-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/LEVIN193-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/poc/LEVIN193-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "3475 E. Foothills Blvd.\nPasadena\nCA\n91107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Darrious Levine"
],
[
"n",
{},
"text",
[
"Levine",
"Darrious",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-626-470-2566"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2021-05-13T08:40:14-04:00"
},
{
"eventAction": "registration",
"eventDate": "2017-11-16T14:20:27-05:00"
}
],
"handle": "ROYYV-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/ROYYV-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/poc/ROYYV-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2022-05-13"
],
"title": "Unvalidated POC"
}
],
"roles": [
"noc",
"technical",
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "4655 Wilfrid-Hamel\nQuebec\nQC\nG1P 2J7\nCanada"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Yves Roy"
],
[
"n",
{},
"text",
[
"Roy",
"Yves",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-418-871-8151;ext5290"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2019-03-28T14:44:25-04:00"
},
{
"eventAction": "registration",
"eventDate": "2019-03-28T14:44:25-04:00"
}
],
"handle": "MOORH10-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MOORH10-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/poc/MOORH10-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2020-03-27"
],
"title": "Unvalidated POC"
}
],
"roles": [
"noc",
"technical",
"dns",
"abuse"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"adr",
{
"label": "424 Lewis Hargett Circle\nSuite 110\nLexington\nKY\n40503\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
{},
"text",
"Chris Moorhead"
],
[
"n",
{},
"text",
[
"Moorhead",
"Chris",
"",
"",
""
]
],
[
"kind",
{},
"text",
"individual"
],
[
"email",
{},
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-859-514-8756"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-07-08T11:37:15-04:00"
},
{
"eventAction": "registration",
"eventDate": "2009-01-21T15:01:23-05:00"
}
],
"handle": "TETRA-15",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/TETRA-15",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/org/TETRA-15",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
{},
"text",
"4.0"
],
[
"fn",
{},
"text",
"TETRA TECH, INC."
],
[
"adr",
{
"label": "3475 E FOOTHILL BLVD.\nPASADENA\nCA\n91107\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
{},
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2021-12-14T20:28:27-05:00"
},
{
"eventAction": "registration",
"eventDate": "1994-06-08T00:00:00-04:00"
}
],
"handle": "NET-198-163-176-0-1",
"ipVersion": "v4",
"links": [
{
"href": "https://rdap.arin.net/registry/ip/198.163.176.0",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
},
{
"href": "https://whois.arin.net/rest/net/NET-198-163-176-0-1",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/ip/198.163.178.0"
}
],
"name": "TETRA-TECH",
"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/198.163.178.0"
}
],
"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/198.163.178.0"
}
],
"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"
],
"startAddress": "198.163.176.0",
"status": [
"active"
],
"type": "DIRECT ALLOCATION"
} Contact details of private individuals are redacted.