--- title: "Area code 227: Maryland, United States" url: "https://lookvalid.com/area-code/227.md" canonical_url: "https://lookvalid.com/area-code/227" last_updated: "2026-10-23" type: "reference" summary: "Area code 227 serves Maryland, United States. Number formats, numbering rules, a live phone validator and the other codes in Maryland." --- # Area code 227: Maryland, United States Area code 227 serves Maryland, United States. Number formats, numbering rules, a live phone validator and the other codes in Maryland. NANPA lists 128 central office codes (prefixes) in use in area code 227, held by 15 holders across 37 rate centers. New Cingular Wireless PCS holds the most prefixes, 33 (26%). 100% of the prefixes are pooled, which means their thousands-blocks can belong to different companies. The FCC unwanted-call data has 88 complaints on file for 81 numbers in 227, most often filed as "Unwanted Calls". These are consumer reports, not findings. ## Facts - In service since: 2023-06-14 - Time zone: Eastern (E) - Assigned overlays: 301 (1947-01-01), 240 (1997-06-01) - Prefixes in use: 128 - Pooled prefixes: 128 (100%) - Rate centers: 37 - Companies holding prefixes: 15 - Assignment dates on file: 2023-07-27 to 2026-07-27 (128 prefixes) - ZIP codes in its places: 30 ## Rate centers | Rate center | Prefixes | Share | | --- | --- | --- | | WSNGTNZN10 | 21 | 16% | | MYERSVILLE | 12 | 9% | | WSHNGTNZN2 | 12 | 9% | | LAUREL236 | 8 | 6% | | ASHTON236 | 7 | 5% | | FREDERICK | 7 | 5% | | GAITHERSBG | 6 | 5% | | WSHNGTNZN4 | 6 | 5% | | 29 other rate centers | 49 | 38% | ## Carriers | Holder | Prefixes | Share | | --- | --- | --- | | New Cingular Wireless PCS | 33 | 26% | | Onvoy | 33 | 26% | | Omnipoint Communications Cap Operations | 21 | 16% | | Verizon Wireless | 9 | 7% | | Commio | 7 | 5% | | Bandwidth.com CLEC | 5 | 4% | | 9 other carriers | 20 | 16% | A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. ## History - 1947-01-01: Area code 301, named as the parent of 227 in the NANPA report, was in service. - 2023-06-14: Area code 227 went into service. ## Nearest area codes The area codes closest to 227, measured between the centers of the ZIP code places they serve, are 571 (about 38 miles), 703 (about 38 miles), 223 (about 73 miles), 717 (about 73 miles) and 443 (about 74 miles). ## ZIP codes 30 ZIP codes fall in places that have a rate center in this area code. The places with the most are Frederick, MD (6 ZIP codes), Hagerstown, MD (6 ZIP codes) and Cumberland, MD (5 ZIP codes). A ZIP code and an area code are unrelated systems, so a ZIP code can sit in more than one area code and an area code spans many ZIP codes. ## Complaints on file 88 complaints for 81 numbers. Numbers whose latest complaint falls in each year: - 2023: 1 - 2024: 20 - 2025: 28 ## Questions ### Where is area code 227? NANPA assigns area code 227 to Maryland, United States. ### In which state does area code 227 sit? Maryland. 227 is one of 6 area codes the NANPA table assigns to the state. ### Which places does area code 227 cover? The places with the most ZIP codes among the rate centers in 227 are Frederick, MD, Hagerstown, MD and Cumberland, MD. The rate center list on this page shows all of them. ### Who owns area code 227? NANPA assigns area codes. Within 227, New Cingular Wireless PCS holds the most prefixes, 33 prefixes or 26%. ### Which time zone does 227 use? The NANPA NPA report lists the time zone for 227 as Eastern (E). ### What year did 227 enter service? The NANPA NPA report gives an in-service date of 2023-06-14, so 227 has been in use since 2023. ### Does area code 227 have an overlay? Yes. 301 (in service 1947-01-01) and 240 (in service 1997-06-01) share the same area with 227, so numbers from all of them are local to each other. ### Which area codes are nearest to 227? The area codes closest to 227, measured between the centers of the ZIP code places they serve, are 571 (about 38 miles), 703 (about 38 miles), 223 (about 73 miles), 717 (about 73 miles) and 443 (about 74 miles). ### How many prefixes does area code 227 have? NANPA's report dated 2026-10-17 lists 128 prefixes in service in 227, spread over 37 rate centers and 15 holders. ### Are there complaints about 227 numbers? The FCC data on file has 88 complaints for 81 numbers in 227. They are unverified consumer reports. A number with no complaints on file is not proven safe. Sources: NANPA central office code report dated 2026-10-17; NANPA NPA report dated 2026-10-18; FCC unwanted-call complaints, data fetched 2026-10-17; ZIP code places from GeoNames (CC BY 4.0).