Big Spring ZIP Code Coverage
Two ZIP codes are documented for the Big Spring postal area: 79720 for standard physical delivery and 79721 for post-office-box and mailing use. They are delivery labels, not an official map of incorporated Big Spring or of every Howard County parcel. A result should therefore retain the exact address string from its source. The best local cross-check is the Howard County Appraisal District's situs address and property identifiers, followed by the City GIS context and the county's 911 addressing route when an address does not resolve.
| ZIP | Areas covered | Post office | Record note |
|---|---|---|---|
| 79720 | Big Spring standard delivery and many physical city and county addresses | Big Spring Post Office | Its delivery geography can extend beyond city limits. An official parcel-level ZIP overlay was not located. |
| 79721 | Big Spring post-office-box and mailing use, including county office PO Boxes | Big Spring postal area | A 79721 mailing label is not evidence of a physical address, city residence, or city-limit location. |
The table is complete for the ZIP uses confirmed in the research. It does not turn nearby Howard County mailing communities into Big Spring ZIPs. A postal city can differ from the incorporated city, taxing unit, election precinct, or street address recognized by 911. Note: Preserve the ZIP with its source date because postal assignments and office mailing practices can change.
Big Spring ZIP Code Post Office
The official USPS location listing identifies the Big Spring Post Office at 501 S Main Street, Big Spring, TX 79720-9998, with a listed phone number of 432-263-7391. Its listed retail hours are Monday through Friday 8 to 5 and Saturday 9 to 12, while PO Box access is listed as 24 hours. Those operating details are useful when a sender must confirm postal service, but they do not settle a parcel or municipal-boundary question.
Use the USPS ZIP lookup for a specific delivery address, then keep the response beside the original record. The 79720-9998 form on the location listing is a ZIP+4 detail for the post office, not a substitute for the ZIP attached to every Big Spring address.
Search Big Spring by Postal ZIP
A ZIP code is best used to narrow an address, not to create a list of people. Howard CAD's documented public Advanced search does not show a ZIP field. It separates street number from street name and also accepts owner name, property ID, geographic ID, property type, tax year, neighborhood, subdivision, and legal description. VoteTexas is a status and registration route, not a ZIP-wide resident roll. City permit records may require a street address, and the public SmartGov Reports page showed no reports during research.
- Run the complete address through the USPS ZIP Code Lookup and preserve the postal result.
- Search Howard CAD using the street number and street name, or a known property or geographic ID.
- Compare the CAD situs address with the Howard CAD-linked parcel map, recognizing that the viewer's fields were not available for inspection.
- For an unresolved rural or renamed address, contact Howard County 911 Addressing rather than guessing from the ZIP.
Once a postal result has narrowed the mailing question to a full street address, the Big Spring street directory follows the address-keyed record trail. Keep a tax-account owner, a recorded party, a permit applicant, and a voter-status result in separate columns. They answer different questions.
Big Spring CAD Postal Checks
Howard CAD is the practical next stop after a postal result narrows a physical address. Its public page labels current values as 2026 certified values and displays tax-year choices from 2017 through 2026. Use fewer terms when a result is missing. The CAD manual says names are stored LASTNAME FIRSTNAME without a comma and that a situs search separates the number from the street name. CAD is an appraisal and tax source, not a deed custodian and not proof of occupancy.
| CAD field | How it helps after ZIP confirmation |
|---|---|
| Street Number and Street Name | Search the situs address without a prefix, suffix, or unit in the street-name field. |
| Property ID or Geographic ID | Carry a stable parcel reference into a map or clerk request. |
| Tax Year | Keep the displayed year with the result because values and ownership displays may change. |
| Property Type | Separate Real, Personal, Mineral, Auto, and Mobile Home records before treating a result as address-related. |
| Legal Description | Compare the CAD wording with the recorded-instrument index when land history matters. |
Howard CAD lists several optional constraints, including subdivision and neighborhood selectors, but research did not document a public ZIP filter. A correct postal code cannot repair an incomplete street or parcel description. When a title or lien question remains, use the Howard County Clerk's Tyler index and request the image or certified copy from the clerk.
The Clerk's portal disclaimer compares its index to a library card catalog: it points to a record but is not the underlying instrument. Search spelling variants and both parties, then carry the legal description or property ID from CAD into the request. The research could not establish the portal's online date cutoff, image availability, or live search fields because an I Accept control and human check stopped inspection. That is a reason to call, visit, mail, or fax the Clerk at 300 S Main Street, Room 104, not a reason to assume the record is absent.
Big Spring ZIPs and City Limits
Big Spring city limits and postal delivery boundaries are different systems. The City GIS page describes its mapping as approximate, warns that some areas may be unmapped, and disclaims survey accuracy, completeness, warranty, and stability. ZIP 79720 may extend beyond incorporated limits. Conversely, a city-limit parcel may use a PO Box or special mailing arrangement. No official parcel-level USPS and city-boundary overlay was located, so neither a postal label nor a map impression should stand alone.
Boundary check. Compare USPS delivery, the CAD situs field, city GIS context, and 911 assignment before describing an address as inside Big Spring. A mailing ZIP alone does not establish location.
The historic record adds another wrinkle. A 1940 Census volume says portions of Howard County precinct 1 were annexed to Big Spring in 1927, 1929, and 1930. An old directory or map may therefore use county geography for a tract now associated with the city. Record the geography as it appeared on the dated source.
Big Spring Postal Address Terms
Postal and land records use different labels for the same place. Reading each label correctly avoids converting a post-office box into a street location or a CAD address into a delivery instruction.
- ZIP and ZIP+4
- A five-digit ZIP identifies a postal delivery area. The added four digits refine delivery routing and do not establish a parcel boundary.
- PO Box ZIP
- A ZIP used with a post-office box is a mailing destination. It may differ from the sender's or recipient's physical situs address.
- Unique ZIP
- A ZIP assigned to one organization or institution for mail handling. Research did not identify a confirmed unique Big Spring ZIP, so do not infer one from a prominent address.
- Carrier route
- A postal delivery sequence used to distribute mail. It is not a city district, neighborhood boundary, or public household list.
- Situs address
- The physical property address used in CAD and many local records. It may not match an owner's mailing address.
Howard County 911 Addressing is the local escalation point for a new, rural, renumbered, or unrecognized situs address. The county publishes 432-264-2266 and P.O. Box 91, Big Spring, TX 79720 for the coordinator, though an official application form was not located.
Big Spring Postal Records Requests
For a record that is not exposed by a postal search, write to the custodian with the full address, ZIP, date range, and record class. The Texas Secretary of State's public-information guidance explains the Texas Public Information Act, Texas Government Code chapter 552. State guidance says any person may request public information without giving a reason, but a request should still be precise enough for the office to locate the record and provide a fee estimate if needed.
For city address records, Big Spring routes public-information requests to JustFOIA, records@mybigspring.com, or City Hall. County deed and related recorded-instrument questions go through the Howard County Clerk and its Tyler portal, which was behind a human-check gate during research. A ZIP can appear in the request, but an address or legal description gives the custodian a more useful starting point.
For a City request, identify whether the target is a permit, inspection, code case, police record, cemetery record, municipal correspondence, or address-specific service record. Give the exact address, approximate dates, and requested format, and ask for electronic delivery or a fee estimate. Big Spring's city public-information route lists in-person City Hall service Monday through Friday from 8 to 5, closed noon to 1. Each role on a permit, such as owner, applicant, contractor, or inspector, should stay distinct in the response.
Big Spring Mailing Address Checks
A Big Spring ZIP on an organization record can identify a mailing contact, not a person's physical location. When a name in an address file belongs to an entity, compare it with the Texas Secretary of State entity-search route and retain the exact legal or trade name. SOSDirect searches can use an entity name or filing number; filing information is an organizational record and should not be recast as a resident record.
Local contacts can also appear in the City resource directory, but that directory is a discovery aid rather than proof of state registration, ownership, or residence. The useful postal-record habit is simple: label each address as delivery, mailing, situs, or organizational contact before drawing any conclusion.