Dundalk, MD — rate center
- State
- Maryland
- Active prefixes
- 19
- Carriers
- 8
- Pooled prefixes
- 15
- LATA
- 238
- Metro area
- Baltimore-Columbia-Towson, MD MSA
The Dundalk rate center (Maryland) anchors 19 active prefixes under area codes 410, 443, 667. Rate centers, not city limits, are what phone numbers are legally tied to.
NANPA records show 19 active prefixes here across 8 carriers. 15 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.
As always with US numbering: a prefix anchored to Dundalk 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 Dundalk
| Prefix | Code holder | Pooled |
|---|---|---|
| 410-282 | VERIZON MARYLAND, INC. | No |
| 410-284 | VERIZON MARYLAND, INC. | No |
| 410-285 | VERIZON MARYLAND, INC. | No |
| 410-288 | VERIZON MARYLAND, INC. | No |
| 410-650 | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | Yes |
FAQ
What area code is Dundalk, MD?
Dundalk is served by 3 area codes — 410, 443, 667 — which overlay the same territory.
How many prefixes does Dundalk have?
19 active NXX prefixes are anchored to this rate center in NANPA records, held by 8 carriers.
Is a call from a Dundalk prefix really from Dundalk?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.