Warwick, MD — rate center

NANPA rate center & CO code data, current as of July 28, 2026.

In NANP numbering, Warwick, Maryland is a rate center — the anchor point for local numbers. It is reached through 410, 667 (multiple area codes serve it).

NANPA records show 3 active prefixes here, held by 3 different carriers. Pooling applies to 3 of them — individual thousands-blocks may belong to different companies.

The rate center belongs to the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD Metropolitan Statistical Area. Routing-wise it sits in LATA 242.

Because 410, 667 all serve this territory, two Warwick numbers can look completely different while being neighbors — check the prefix, not just the area code.

Warwick is a small rate center: 3 prefixes across 3 carriers serve it. Small localities like this often keep the same blocks for decades, so the prefix-to-place mapping tends to be stable.

As always with US numbering: a prefix anchored to Warwick tells you where the block was issued. The person calling may have ported the number, moved away, or be spoofing it entirely — verify callers through independently found contact details.

Prefixes anchored to Warwick

FAQ

What area code is Warwick, MD?

Warwick is served by 2 area codes — 410, 667 — which overlay the same territory.

How many prefixes does Warwick have?

3 active NXX prefixes are anchored to this rate center in NANPA records, held by 3 carriers.

Is a call from a Warwick prefix really from Warwick?

Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.