Area code
Area code 557 — St. Louis, MO
Missouri · in service since August 12, 2022
Area code 557 covers parts of Missouri; the place with the most of its prefixes is St. Louis. It is an overlay: 314 serves the same area, so neighbors can have different area codes.
Overlay, same area: 314
Local time in St. Louis
Spam reports from Sep 23 – Oct 22, 2026
Low #404 of 461 codes
23 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneCentral Time
- Local calls10 digits
- Prefixes98 assigned
- Runs out~4Q 2060
- Unwanted call?Block & report
Spam call reports about 557 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 3 |
| Sep 14 | 2 |
| Sep 21 | 5 |
| Sep 28 | 5 |
| Oct 5 | 5 |
| Oct 12 | 3 |
| Oct 19 (4 days) | 6 |
Compared with all codes
- Robocalls
- 50%all codes 75%
- Callers with the same code
- 3%all codes 35%
- Rank by complaints
- #404of 461 · bottom quarter
- FCC complaints, Oct 2025 – Sep 2026
- 2
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Medical & prescriptions | 3 10% | |
| Reducing your debt (credit cards, mortgage, student loans) | 3 10% | |
| Calls pretending to be government, businesses, or family and friends | 1 3% | |
| Dropped call or no message | 1 3% | |
| Home improvement & cleaning | 1 3% | |
| Other | 17 59% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| Missouri | 14 48% | |
| Ohio | 5 17% | |
| California | 2 7% | |
| Florida | 1 3% | |
| Illinois | 1 3% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 557 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| ST LOUIS | St. Louis | St. Louis city | 36 |
| LADUE | La Due | Henry County | 17 |
| KIRKWOOD | Kirkwood | St. Louis County | 13 |
| CREVECOEUR | Creve Coeur | St. Louis County | 6 |
| MEHLVILLE | Mehlville | St. Louis County | 5 |
| SAPPINGTON | Sappington | St. Louis County | 5 |
| OAKVILLE | Oakville | St. Louis County | 2 |
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Missouri
- Assigned by NANPA
- October 30, 2000
- Local dialing
- 10 digits (NANPA: 10D)
- NANPA planning letters
- PL-567, PL-303, PL-279, PL-261
Source: NANPA, NPA database of Oct 24, 2026.
Is 557 running out of numbers?
Previous forecast (October 2025): 2063, moved earlier by 3 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 557 prefixes
The five largest of 20 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| New Cingular Wireless PCS, LLC | 23 23% | |
| Onvoy, LLC | 19 19% | |
| Teleport Communications America, LLC | 15 15% | |
| Multiple Ocn Listing | 9 9% | |
| Verizon Wireless | 8 8% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 557
What area code is 557?
A Missouri area code, in service since August 12, 2022.
Where is 557 area code, and what time zone is it in?
St. Louis, MO; Central Time.
Why am I getting spam calls from 557?
23 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 557 get a new area code?
NANPA forecasts exhaust in 4Q 2060; no relief planning listed.