Cardiff, MD — rate center
- State
- Maryland
- Active prefixes
- 7
- Carriers
- 7
- Pooled prefixes
- 6
- LATA
- 238
- Metro area
- Baltimore-Columbia-Towson, MD MSA
Phone numbers "from Cardiff" are, precisely speaking, numbers whose prefixes are anchored to the Cardiff rate center of Maryland, under 410, 443, 667.
The rate center currently carries 7 working prefixes across 7 carriers. 6 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
The rate center belongs to the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area. Routing-wise it sits in LATA 238.
Multiple area codes over one rate center (410/443/667) is the overlay pattern: same geography, different first three digits.
A Cardiff prefix on caller ID is a starting point, not proof of origin — numbers travel with their owners and displays can be spoofed. Use official callback numbers for anything sensitive.
Prefixes anchored to Cardiff
| Prefix | Code holder | Pooled |
|---|---|---|
| 410-452 | VERIZON MARYLAND, INC. | Yes |
FAQ
What area code is Cardiff, MD?
Cardiff is served by 3 area codes — 410, 443, 667 — which overlay the same territory.
How many prefixes does Cardiff have?
7 active NXX prefixes are anchored to this rate center in NANPA records, held by 7 carriers.
Is a call from a Cardiff prefix really from Cardiff?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.