Sumner Missouri ZIP Codes

Sumner holds a single ZIP code.

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Sumner codes above are listed without a column we would have to invent.

Scope every ZIP code recorded for Sumner. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.

Every Sumner ZIP code begins 646. Those first three digits identify the sectional center facility that processes mail for this part of Missouri. Statewide that range covers 55 ZIP codes, so Sumner accounts for 2% of it.

Every Missouri ZIP prefix and the region it covers →

ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Sumner occupies.

• 660 Area code 660

Sumner Missouri area codes in full →

Straight-line distance between place reference points, not driving distance.