MSP-US-CA-CASTELLAN · DatasheetRev. 8 Nov 2026
Castellan logo

MSP-US-CA-CASTELLAN

Castellan

Managed service provider · Calabasas, California

Founded 1999

Website castellan.netLinkedIn

Last checked 8 Nov 2026 · 18 sourced facts

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“Castellan provides IT consulting, managed IT services and business IT support in Los Angeles to improve security, reliability and technology performance.”reported by the company · castellan.net · 8 Nov 2026

Staff / size
–
Founded
199927 yrs
Offices
1
Services
9of 13
Industries
0
Stack tools
3
Certifications
0
Support
–

1Stack: the tools we found

Marks: DNS detected in public DNS, Site named or badged on their site, Job ad named in their job ad. “Not found” means not seen on public pages, not “not used”. See how we check.

Every tool with its source
ToolHow we know
Freshservice / Freshdeskdetected (public DNS) · helpdesk.castellan.net · 8 Nov 2026
Barracudapartner badge on their site · castellan.net · 8 Nov 2026
Veeampartner badge on their site · castellan.net · 8 Nov 2026
Microsoft 365 (own mail)detected (public DNS) · castellan.net · 8 Nov 2026

2Services coverage

From castellan.net/it-support-burbank/, castellan.net/it-support-calabasas/, castellan.net/cyber-security-los-angeles/, castellan.net/it-support-glendale/. Empty squares: not found on their pages.

3Industries served

no industry pages found

Client size targetednot published

4Support model

hours not published

Support hoursnot published
Published hoursnot published
24/7 monitoringyesreported by the company · castellan.net · 8 Nov 2026
After-hours / emergency linenot published
Help desk locationnot published
Response time / SLAnot published

5Location and company

HQ · California

Outline: US Census Bureau cartographic boundaries. HQ position from its public map listing, to about 1 km.

Headquarters23923 Ventura Blvd, Calabasas, CA 91302Google Maps listing · google.com · 8 Nov 2026
Other officesnot published
Service area (as published)Serving Los Angeles and Surrounding Areas withreported by the company · castellan.net · 8 Nov 2026
Trading nameCastellanGoogle Maps listing · google.com · 8 Nov 2026
Legal nameCastellan Increported by the company · castellan.net · 8 Nov 2026
Phone (switchboard)+1 818-789-0088Google Maps listing · google.com · 8 Nov 2026
Business mailboxnot published
Ownershipnot published
Google ratingnot published

6Size, certifications and peers

Staff (their site)not published
Size bandnot published
LinkedIn company sizenot published
Clients (as published)not published
Microsoft partnernot published
Vendor partner tiersnot published
Own certificationsnot published
Compared with peers
  • size not published
  • 3 stack tools found vs a median of 1 across 7,126 fully researched US MSPs.
  • 9 of 13 services vs a median of 9.

From the public profiles on MSP Scope (sample sizes shown). Facts not found count as not found, so small or quiet websites score lower.

7Timeline

  1. 1999Foundedreported by the company · castellan.net · 8 Nov 2026

Only dated, sourced items. Acquisitions and rebrands appear here when the MSP or a public register states them.

8Pricing (as published)

no prices published on the pages we read

Only prices the MSP publishes for its own managed service (per user or per device). See published MSP pricing.

9Nearby and similar MSPs in Calabasas

Same town first, then similar size, stack and services. More: all MSPs in Calabasas · all MSPs in California · other MSPs offering help desk / it support.

10Revision history and sources

Researched 8 Nov 2026 (full pass), last checked 8 Nov 2026. 11 public pages read.

Logo: from castellan.net, the MSP’s own site, seen 8 Nov 2026; trimmed and resized only. Remove or replace it.

Pages we read

Anything not found stays empty. We never guess. Spot an error? Correct it.