U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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ZIP Code Details for Ona

Detailed geographic and postal record lookup for the city of Ona.

Postal Information

ZIP Code 16601
Type Standard
Primary City Altoona
State PA
County Blair County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 582, 814
Latitude 40,56° N
Longitude -78,37° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Altoona, PA

Postal Information

ZIP Code 16602
Type Standard
Primary City Altoona
State PA
County Blair County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 582, 814
Latitude 40,5° N
Longitude -78,4° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Altoona, PA

Postal Information

ZIP Code 16603
Type Po Box
Primary City Altoona
State PA
County Blair County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 814
Latitude 40,5° N
Longitude -78,4° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Altoona, PA

Postal Information

ZIP Code 16656
Type Standard
Primary City Irvona
State PA
County Clearfield County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 582, 814
Latitude 40,77° N
Longitude -78,55° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Irvona, PA

Postal Information

ZIP Code 17767
Type Po Box
Primary City Salona
State PA
County Clinton County
Acceptable Cities -
Unacceptable Mill Hall
Time Zone America/New_York
Area Codes 570
Latitude 41,08° N
Longitude -77,46° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Salona, PA

Postal Information

ZIP Code 17929
Type Standard
Primary City Cressona
State PA
County Schuylkill County
Acceptable Cities -
Unacceptable West Cressona
Time Zone America/New_York
Area Codes 272, 570
Latitude 40,63° N
Longitude -76,19° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Cressona, PA

Postal Information

ZIP Code 20650
Type Standard
Primary City Leonardtown
State MD
County St. Mary's County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 38,29° N
Longitude -76,64° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Leonardtown, MD

Postal Information

ZIP Code 20685
Type Standard
Primary City Saint Leonard
State MD
County Calvert County
Acceptable Cities -
Unacceptable St Leonard
Time Zone America/New_York
Area Codes 227, 240, 301, 410, 443, 667
Latitude 38,47° N
Longitude -76,5° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Saint Leonard, MD

Postal Information

ZIP Code 21539
Type Standard
Primary City Lonaconing
State MD
County Allegany County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,56° N
Longitude -78,97° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Lonaconing, MD

Postal Information

ZIP Code 23417
Type Standard
Primary City Onancock
State VA
County Accomack County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 757, 948
Latitude 37,7° N
Longitude -75,74° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Onancock, VA

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Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.