Area code
563
563 is a United States area code. Under the North American Numbering Plan it belongs to Iowa, which has 5 area codes in total.
Validate a number in 563
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
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Area code 563 at a glance
NANPA lists 388 central office codes (prefixes) in use in area code 563, held by 71 holders across 109 rate centers.
| Fact | Value |
|---|---|
| In service since | 2001-03-25 |
| Time zone | Central (C) |
| Prefixes in use | 388 |
| Pooled prefixes | 277 (71%) |
| Rate centers | 109 |
| Companies holding prefixes | 71 |
| Assignment dates on file | 2001-01-04 to 2026-06-03 (174 prefixes) |
| ZIP codes in its places | 105 |
Rate centers in area code 563
| Rate center | Prefixes | Share |
|---|---|---|
| DAVENPORT | 79 | 20% |
| DUBUQUE | 36 | 9% |
| MUSCATINE | 19 | 5% |
| CLINTON | 18 | 5% |
| DE WITT | 12 | 3% |
| DECORAH | 11 | 3% |
| MANCHESTER | 6 | 2% |
| CRESCO | 5 | 1% |
| 101 other rate centers | 202 | 52% |
Who holds the prefixes in 563
Qwest holds the most prefixes, 54 (14%). 71% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Qwest | 54 | 14% |
| United States Cellular | 33 | 9% |
| Windstream Iowa Communications, INC. - North | 26 | 7% |
| T-Mobile USA | 25 | 6% |
| Windstream Iowa Communications, INC. - Systems | 22 | 6% |
| New Cingular Wireless PCS | 18 | 5% |
| 65 other carriers | 210 | 54% |
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. Find which carrier a number is on, or browse the prefix holders.
History of area code 563
- 1947-01-01 Area code 319, named as the parent of 563 in the NANPA report, was in service.
- 2001-03-25 Area code 563 went into service.
Area codes nearest to 563
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
ZIP codes in area code 563
105 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Davenport, IA | 9 |
| Dubuque, IA | 5 |
| Clinton, IA | 4 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 563 numbers
964 FCC complaints are on file for 752 numbers in 563, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 27 |
| 2024 | 35 |
| 2025 | 56 |
Other area codes in Iowa
Iowa is one state with 5 area codes in the NANPA table. 563 is one of them.
Next to 563 in the numbering table
These are the codes just before and after 563 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 563 was first assigned in Iowa. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Iowa next to a 563 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 563
Where is area code 563?
NANPA assigns area code 563 to Iowa, United States.
In which state does area code 563 sit?
Iowa. 563 is one of 5 area codes the NANPA table assigns to the state.
Which places does area code 563 cover?
The places with the most ZIP codes among the rate centers in 563 are Davenport, IA, Dubuque, IA and Clinton, IA. The rate center list on this page shows all of them.
Who owns area code 563?
NANPA assigns area codes. Within 563, Qwest holds the most prefixes, 54 prefixes or 14%.
Which time zone does 563 use?
The NANPA NPA report lists the time zone for 563 as Central (C).
What year did 563 enter service?
The NANPA NPA report gives an in-service date of 2001-03-25, so 563 has been in use since 2001.
Does area code 563 have an overlay?
The NANPA NPA report lists no other area code in an overlay with 563.
Which area codes are nearest to 563?
The area codes closest to 563, measured between the centers of the ZIP code places they serve, are 319 (about 56 miles), 608 (about 81 miles), 353 (about 97 miles), 641 (about 116 miles) and 309 (about 124 miles).
How many prefixes does area code 563 have?
NANPA's report dated 2026-10-17 lists 388 prefixes in service in 563, spread over 109 rate centers and 71 holders.
Are there complaints about 563 numbers?
The FCC data on file has 964 complaints for 752 numbers in 563. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.