Rhode Island Address Generator

Rhode Island is the smallest complete address fixture in the country: 90 postal codes, fewer than any other state, under just two three-digit prefixes — 028 and 029. Only Hawaii is as concentrated. If you want a state you can enumerate entirely in a test rather than sample, this is the one; the whole postal geography fits in a short array.

Its counties are the interesting part. Rhode Island's five counties have no county government — the state is administered through its cities and towns, and the counties survive as geographic areas used for statistical reporting and court jurisdiction. So a Rhode Island record can carry a county name that corresponds to no authority, no budget and no rate.

That puts Rhode Island in the same family as Connecticut, which went further and replaced its counties outright in the Census Bureau's geography in 2022, and it makes both states a useful check on an assumption most jurisdiction code holds silently: that a county name implies a government you can look something up in. In New England that is often false, and it has been false in Rhode Island for a very long time.

The place-name figures reinforce how small the state is: 70 distinct USPS place names across 90 codes, so most codes are a place of their own rather than one slice of a city. Address matching in Rhode Island is therefore unusually forgiving — which is exactly why it is a poor state to validate an address matcher against, and a good one for a quick end-to-end fixture.

Rhode Island is one of the 25 state-level jurisdictions whose prefixes form a single unbroken run, in its case a run of two: 028 and 029. That is the shortest range in the country, and it means a Rhode Island prefix rule is one comparison rather than a set membership test. Delaware, with three prefixes and three counties, is the only state that comes close to being this enumerable.

Random Rhode Island phone numbers here use the state's real area code — 401 — with the 555-01XX line range the North American Numbering Plan reserves for fiction, so a number such as (401) 555-0196 passes format and area-code checks yet can never ring anyone. Every profile this page generates carries one that agrees with its Rhode Island address; for a batch of numbers on their own, the random Rhode Island phone number generator draws from the same range with any US area code.

Three examples in the reserved range: (401) 555-0196, (401) 555-0107, (401) 555-0168. Area codes are geographic, so a Rhode Island address paired with a non-RI area code fails the consistency check that fraud systems and good validators run — which is why this page pins both to Rhode Island. How area codes are assigned, and why the 555 block exists, are covered in how US area codes work and why fake phone numbers start with 555.