---
title: "Area code 563: Iowa, United States"
url: "https://lookvalid.com/area-code/563.md"
canonical_url: "https://lookvalid.com/area-code/563"
last_updated: "2026-10-23"
type: "reference"
summary: "Area code 563 serves Iowa, United States. Number formats, numbering rules, a live phone validator and the other codes in Iowa."
---

# Area code 563: Iowa, United States

Area code 563 serves Iowa, United States. Number formats, numbering rules, a live phone validator and the other codes in Iowa.

NANPA lists 388 central office codes (prefixes) in use in area code 563, held by 71 holders across 109 rate centers.
Qwest holds the most prefixes, 54 (14%). 71% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
The FCC unwanted-call data has 964 complaints on file for 752 numbers in 563, most often filed as "Unwanted Calls". These are consumer reports, not findings.

## Facts

- 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

| 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% |

## Carriers

| 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.

## History

- 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.

## Nearest area codes

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).

## ZIP codes

105 ZIP codes fall in places that have a rate center in this area code. The places with the most are Davenport, IA (9 ZIP codes), Dubuque, IA (5 ZIP codes) and Clinton, IA (4 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

964 complaints for 752 numbers. Numbers whose latest complaint falls in each year:

- 2023: 27
- 2024: 35
- 2025: 56

## Questions

### 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.

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).