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Phone Numbers: (712) 278-XXXX
Recently Searched Numbers in the 712 Area Code
About the (712) 278 Prefix
The (712) 278 prefix serves Sioux City, Iowa, United States. Phone numbers in this exchange follow the format (712) 278-XXXX. The primary carrier assigned to this prefix is HEARTLAND COMMUNICATIONS.
(712) 278 Geographic Info
- Primary City
- Sioux City
- State
- Iowa, United States
- Primary Carrier
- HEARTLAND COMMUNICATIONS
Other Prefixes in the 712 Area Code
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The most effective setup layers built-in OS protection with one real-time third-party app. For iPhone: enable Silence Unknown Callers plus Truecaller or Hiya. For Android: enable Google's spam filter plus Truecaller or Hiya. Add your carrier's free spam tool for a third layer.
Read more: How to Stop Spam Calls on iPhone and Android (2026 Guide) →Frequently Asked Questions
What area code is (712) 278?
(712) 278 is a telephone prefix in the 712 area code, which serves Sioux City, Iowa, United States.
Where is the (712) 278 prefix located?
Phone numbers with the (712) 278 prefix are located in Sioux City, Iowa, United States. The primary carrier for this prefix is HEARTLAND COMMUNICATIONS.
What carrier uses the (712) 278 prefix?
The primary carrier assigned to the (712) 278 prefix is HEARTLAND COMMUNICATIONS. However, numbers may be ported to other carriers over time.
How do I look up a phone number with the (712) 278 prefix?
Enter the full 10-digit number (e.g. (712) 278-XXXX) into ClarityCheck's reverse phone lookup to instantly see the owner's name, address, social profiles, and more.