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641 Area Code

Area code 641 serves Marshalltown, Mason City, Ottumwa, Newton, Oskaloosa and nearby communities in Iowa. It has been in service since July 9, 2000, when it was split from 515.

StateIowa
Time zoneCentral
Local time now…
Prefixes in use584
Projected to run out2037
MarshalltownMason CityOttumwaNewtonOskaloosaPellaGrinnellFairfieldClear LakeKnoxvilleCrestonCharles CityOsceolaCentervilleIowa FallsMarshalltownMason CityOttumwaNewtonOskaloosa
Cities and towns served by area code 641

Who issues 641 numbers

Mobile 23%VoIP and cable 11%Landline 65%

Share of the 584 prefixes (the three digits after 641) assigned to each type of carrier. Classification by carrier name, approximate.

CarrierPrefixes
Windstream123
Onvoy (Sinch)51
Verizon Wireless46
UScellular39
Lumen (Qwest)30
AT&T Mobility28
Farmers Tel. Co.28
T-Mobile23

Cities and towns in area code 641

CityPopulationOther area codes
Marshalltown27,536
Mason City26,853
Ottumwa25,319
Newton15,741
Oskaloosa11,493
Pella10,992
Grinnell9,430
Fairfield9,220
Clear Lake7,601
Knoxville7,469
Creston7,335
Charles City7,013
Osceola5,679
Centerville5,327
Iowa Falls5,013

Got a call from 641?

A 641 number was originally issued in Iowa, but that does not prove the caller is there. 11% of 641 prefixes belong to VoIP and cable providers, whose numbers can be bought online and used from anywhere. Caller ID can also be spoofed, so treat urgent requests for money, codes or passwords from any area code with suspicion, and call back on a number you already know.

All 584 prefixes in area code 641

Format: (641) XXX-YYYY. Carrier is the company the block was originally assigned to; numbers may since have been ported to another carrier.

Questions about area code 641

Where is area code 641?
Area code 641 is in Iowa. It covers Marshalltown, Mason City, Ottumwa, Newton, Oskaloosa, Pella and 9 more cities and towns.
What time zone is area code 641?
Area code 641 is in the Central time zone.
Is 641 a toll-free number?
No. 641 is a geographic area code in Iowa. Toll-free numbers in the US start with 800, 833, 844, 855, 866, 877 or 888.
Will area code 641 run out of numbers?
NANPA's latest forecast projects area code 641 to exhaust in the first quarter of 2037. Before that happens, a new area code is usually added as an overlay; existing numbers keep their code.

Other area codes in Iowa