557 Area Code Location & Zip Codes – United States Guide

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📞 557 Area Code — Quick Reference
📍 LocationSt. Louis, Missouri
🕐 Time ZoneCentral (UTC-6/UTC-5)
🗓️ StatusActive — Geographic

Numbers starting with 557 connect to St. Louis and nearby areas in Missouri. Whether you received an unexpected call from this number or you’re trying to figure out where a 557 number is based, this guide covers the exact location, time zone, spam reputation, blocking instructions, and which cities fall under this code.

📍 Where Is the 557 Area Code Located?

The 557 area code is located in Missouri, primarily serving St. Louis and the surrounding region. It’s a standard geographic area code under the North American Numbering Plan (NANP). Keep in mind that mobile number portability means someone could carry a 557 number with them after moving — so the code tells you where the number was issued, not necessarily where the person is right now.

557 Area Code — Location Details
State/ProvinceMissouri (MO)
Major CitySt. Louis
CountryUnited States (+1)
Time ZoneCentral (UTC-6/UTC-5)
TypeGeographic — Standard
NANPA StatusActive

🕐 557 Area Code Time Zone

The 557 area code operates in the Central Time Zone (UTC-6/UTC-5). Here’s how it compares to other US time zones:

Time ZoneDifference from 557
Eastern Time+1 hour
Central TimeSame time
Mountain Time-1 hour
Pacific Time-2 hours
💡 Calling Tip: Reach someone in the 557 area between 10 AM – 4 PM their local time for the best chance of an answer. Calls outside those hours are more likely to be screened or ignored.

🛡️ Is 557 Area Code Spam or Scam?

The 557 area code is completely legitimate, covering real residents and businesses in St. Louis. However, spam callers love spoofing well-known area codes like 557 because you’re more likely to pick up a local-looking number. If an unexpected 557 caller asks for personal info or payment, that’s your red flag.

⚠️ Red Flag: If a 557 caller demands immediate payment via gift cards, wire transfer, or crypto — hang up. No legitimate organization uses these methods. Verify by calling the company’s official number directly.

How to verify: Don’t call back the number — look up the official number for whatever organization the caller claimed to represent and call that instead. Google the full 10-digit number in quotes to check if others have reported it as spam.

📵 How to Block 557 Spam Calls & Texts

Block on iPhone

  1. Open Phone → tap Recents
  2. Tap ⓘ next to the 557 spam number
  3. Scroll down → “Block this Caller”
  4. Silence all unknowns: Settings → Phone → Silence Unknown Callers → ON

Block on Android

  1. Open Phone → find the 557 number
  2. Tap ⋮ menu → “Block number”
  3. For broader blocking: Settings → Blocked numbers → Unknown toggle ON

Report Spam

  1. Forward spam texts to 7726 (SPAM)
  2. Report at reportfraud.ftc.gov
  3. Register at donotcall.gov or call 1-888-382-1222

🔍 Who Called from 557? Reverse Lookup

  1. Google the full 10-digit number in quotes — catches ~70% of unknown callers
  2. Check Whitepages.com or Truecaller.com
  3. Search 800notes.com for community reports
  4. No voicemail left? Almost certainly spam — legitimate callers leave messages
⚠️ One-Ring Scam: If a 557 number rings once and hangs up, do NOT call back. This scam connects you to a premium-rate line that charges your bill.

🔗 Nearby Area Codes

CodeLocationTime Zone
314St. Louis, MissouriCentral
816Kansas City, MissouriCentral
417Springfield, MissouriCentral
573Columbia, MissouriCentral
636St. Charles, MissouriCentral

❓ 557 Area Code — FAQ

What state is 557 area code in?
The 557 area code is in Missouri, serving St. Louis and surrounding areas.
What city does 557 cover?
557 primarily covers St. Louis and nearby communities in Missouri.
Is 557 toll-free?
No. 557 is a geographic area code. Toll-free codes are 800, 833, 844, 855, 866, 877, 888.
What time zone is 557?
Central (UTC-6/UTC-5).
Is 557 a scam?
557 is legitimate — it serves real people in St. Louis. But scammers may spoof 557 numbers. Verify suspicious callers independently.
Why do I keep getting 557 calls?
Repeated 557 calls without a known contact are likely robocalls. Use your phone’s Silence Unknown Callers feature.
Can I get a 557 number remotely?
Yes — VoIP services like Google Voice offer 557 numbers regardless of where you live.
Is 557 cell or landline?
557 covers both. US area codes don’t distinguish between mobile and landline.
How do I block 557 calls?
iPhone: Settings → Phone → Silence Unknown Callers. Android: Phone → Settings → Blocked numbers. For area-code blocking, use Truecaller or RoboKiller.

🔗 Related Area Code Guides

Updated April 2026 · Data from NANPA & FCC · areacodess.org/