Area Code 870 — Jonesboro, Arkansas

NANP area code

870

UTC−6, UTC−5 during daylight saving

State
Arkansas
Primary city
Jonesboro
Time zone
Central
In service
1997
Overlay
327

The code reaches 404 communities and 61 counties across Arkansas.

Was this call legitimate?

The area code itself carries no risk signal. 870 is assigned to Jonesboro, Arkansas, so a call from it is consistent with a real caller in that area — but the digits alone prove nothing, because they can be forged.

Caller ID is set by whoever places the call, not verified by the network. That is why neighbour spoofing works: an operation anywhere in the world can display a number that matches the area code — and often the first three digits after it — of the person being called, so the call looks local. Every community in the 870 territory is a plausible-looking origin for a forged 870 number, which is why one can be made to look like a neighbour to so many people. The same applies to its overlay code 327, which serves the same ground.

If you did not recognise the call: let it go to voicemail — a legitimate caller with real business will leave one. Do not return the call using the number shown; look the organisation up independently and call the number you found. Never confirm personal details, card numbers, or one-time codes to someone who called you, however plausible the number looked.

Codes.zone publishes no complaint counts, risk scores, or caller identities. We hold no data on individual numbers and will not estimate what we cannot source.

Local time and when to call back

Time there now

Central · UTC−6, UTC−5 during daylight saving

Reasonable callback window

8:00 AM – 9:00 PM

local time in Central

Federal rules bar telemarketing calls to a residence outside 8:00 AM–9:00 PM in the called party's own time zone. It is a sensible bound for a personal callback too — and a caller who rang you well outside it was not observing it.

Overlay codes and ten-digit dialling

870 does not have its territory to itself. 327 covers the same ground, serving Jonesboro and the rest of the 870 territory. An overlay is what a regulator adds when a region runs out of assignable numbers: rather than splitting the area and forcing half the residents to change their number, a second code is laid over the top and new numbers are issued from it.

The practical consequence: two neighbours on the same street can hold numbers in different area codes, so the code tells you nothing about which part of town a caller is in — and local calls must be dialled as all ten digits, because seven is no longer unambiguous.

Cities served

largest 20 by ZIP count
Communities served by area code 870, ranked by how many ZIP codes each holds.
CityZIP codesCounty
Jonesboro5Craighead County
Pine Bluff4Jefferson County
Arkadelphia3Clark County
Monticello3Drew County
Batesville2Independence County
Blytheville2Mississippi County
Camden2Ouachita County
Cherokee Village2Sharp County
El Dorado2Union County
Eureka Springs2Carroll County
Forrest City2St. Francis County
Harrison2Boone County
Hope2Hempstead County
Magnolia2Columbia County
Mountain Home2Baxter County
Norfork2Baxter County
Oden2Montgomery County
Paragould2Greene County
Timbo2Stone County
West Memphis2Crittenden County

384 further communities not listed. All Arkansas area codes →

Each point is a community served by 870, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.
  • Reference points and footprint
  • Not an official NANPA boundary
  • Not a USPS delivery area

Scope every community matched to 870. Source geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot), GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . Coordinates are place reference points, not boundaries.

Counties

Prefixes inside 870

We do not publish the NXX prefixes inside 870. The assignment of prefixes to rate centres comes from LERG routing data, which is proprietary, and we will not estimate it from postal data — ZIP codes and telephone prefixes do not map onto each other. Awaiting a clean-rights NPA-NXX source.

Why this code exists

870 has served this territory since 1997. It eventually ran short of exchanges to hand out, and rather than split the region and make half its residents change their number, the regulator laid 327 over the same ground in 2024. New lines here are issued from the newer code, which is why a neighbour’s number may not start with 870.