Smith Island, MD — rate center
Phone numbers "from Smith Island" are, precisely speaking, numbers whose prefixes are anchored to the Smith Island rate center of Maryland, under 410, 667.
The rate center currently carries 2 working prefixes across 2 carriers. 2 prefixes participate in thousands-block pooling, so blocks of 1,000 numbers are shared between carriers.
Routing-wise it sits in LATA 242.
Multiple area codes over one rate center (410/667) is the overlay pattern: same geography, different first three digits.
With only 2 prefixes, Smith Island sits at the small end of Maryland's rate centers — a handful of carrier blocks cover the whole locality, and a number from here is a fairly strong locality signal (before porting is considered).
A Smith Island 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 Smith Island
| Prefix | Code holder | Pooled |
|---|---|---|
| 410-425 | VERIZON MARYLAND, INC. | Yes |
FAQ
What area code is Smith Island, MD?
Smith Island is served by 2 area codes — 410, 667 — which overlay the same territory.
How many prefixes does Smith Island have?
2 active NXX prefixes are anchored to this rate center in NANPA records, held by 2 carriers.
Is a call from a Smith Island prefix really from Smith Island?
Not necessarily. The prefix marks where the number block was issued; porting, VoIP and spoofing all detach calls from that geography.