This PO box lookup directory lists every PO box we have written a dedicated post about, sorted by state, with a link to each one. To use it, find the box number on your envelope, then check that the city and ZIP code match the entry before you read the post. If your box is not here, that tells you nothing about the letter, good or bad. It only means we have not written that box up yet. Either way, the safe check is the same: call the number on your own card, statement or ID card, not the number printed in the letter.
Index last checked: September 23, 2026. It holds 40 posts covering boxes in 20 states.
How to use this PO box lookup directory
Box numbers repeat. PO Box 4115 in one city and PO Box 4115 in another are two different boxes rented by two different customers, so a number on its own proves nothing. Match three things, in this order:
- The box number. Use your browser’s find tool (Ctrl+F on Windows, Command+F on a Mac) and type the digits only, for example 14079. Some titles below write “P.O. Box” and some write “PO Box”, so searching the digits catches both.
- The city and state. Entries are grouped by state. If the number matches but the city does not, it is not the same box.
- The five-digit ZIP code. Where a post title includes the ZIP, compare it with your envelope. A different ZIP means a different post office, and a different box.
Two more lines on an envelope can matter. A “Dept” line above the box routes mail inside one box holder’s operation, and the four extra digits after the ZIP (the ZIP+4) sort mail more finely. Neither replaces the three checks above.
Once all three match, open the post and compare what it says with the letter in your hand. If anything disagrees, trust your own paperwork over our page.
What this directory can and cannot tell you
Each post in this index covers one box. That is the whole job, and it has limits worth stating plainly.
- It is not a safety verdict. A real company’s box can appear on a fake letter, because anyone can print any return address on an envelope. No page here can confirm that the specific envelope you are holding came from the sender a post describes.
- Some older titles ask “legit or scam” questions. A question in a title is not a finding about any company. Read the post itself for what was confirmed and where.
- Boxes change hands. Companies close boxes, move their mail processing and open new ones. An identification that was right when it was written can go stale, which is why your own card or statement outranks any web page, including ours.
- Absence is not a signal. This list covers only the boxes we have written about, a small fraction of the boxes in use across the United States.
- It is not a mailing instruction. Never send a medical claim, a payment or personal documents to a box because a web page listed it. Use the address printed on your member ID card, plan documents or billing statement, and if you are unsure, call the number on that card and ask.
Why there is no official PO box lookup directory
Many people searching for a PO box lookup directory expect a public register, something like a phone book for boxes. In the United States, none exists. Under a USPS final rule published in the Federal Register on January 25, 2000, the Postal Service stopped releasing a box holder’s name and address to the general public on request, including for boxes used for business. Release is limited to narrow cases, such as government agencies and people serving legal process.
The Postal Service does know who rents each box. The USPS page on renting a PO Box, which we read on September 23, 2026, says a renter takes a completed application and two forms of ID to the Post Office where the box is located. That record stays with USPS.
Some commercial sites sell reverse PO box searches, and plenty of free pages claim to name the owner of a box. Before trusting any lookup result, including ours, ask one question: where did this name come from? Our editorial standard for identifications is that the company’s own official page, or a government page, lists that exact box. When a box cannot be confirmed that way, the honest answer is “we could not confirm who uses this box”, and the next step is the phone number on your own card or statement.
The index: every PO box we have written up, by state
Every entry below links to a live post on this site and uses that post’s own title. States run in alphabetical order. Watch for near-matches: Lexington, Kentucky has two entries that differ by only a few digits, and Sioux Falls, South Dakota has three.
California
- PO Box 10 Anaheim CA 92815 Explained: What It Is and Why You Got Mail From It
- Who Owns PO Box 4115 Concord CA? Everything You Need to Know
- PO Box 92079 Long Beach CA 90809: Who Sends Mail From It?
- Who Owns PO Box 7280 Los Angeles CA 90022?
- PO Box 99751 Sacramento CA 95899: Who Sends Mail From It?
- Who Owns PO Box 6099 Torrance CA 90504?
Delaware
Georgia
Illinois
Kentucky
- PO Box 14079 Lexington KY 40512: Who Is It?
- Who Uses PO Box 14094 Lexington KY 40512?
- PO Box 7203 London KY 40742: Who Sends Mail From It?
- Who Uses PO Box 23200 Louisville KY?
Maine
Massachusetts
Michigan
Minnesota
- PO Box 39088 Minneapolis MN: Who Sent It?
- PO Box 64437 St Paul MN Address Lookup | What You Need to Know
Missouri
New Mexico
Ohio
- PO Box 498067 Cincinnati OH 45249 Explained
- PO Box 94670 Cleveland OH 44101: Who Is It?
- PO Box 6184 Westerville OH 43086: Who Sends Mail From It?
Oregon
Pennsylvania
- P.O. Box 1280 Oaks PA 19456 | 5 Things You Should Know
- PO Box 13337 Philadelphia PA 19101: Who Is It?
- Is PO Box 4262 Scranton PA a Real Address?
South Dakota
- Is PO Box 881 Sioux Falls SD Legit? Here’s What You Need to Know
- Is PO Box 5519 Sioux Falls SD Safe? Here’s What You Need to Know
- PO Box 6072 Sioux Falls | How to Identify Sender
Tennessee
Texas
Utah
- P.O. Box 17316 Salt Lake City | Who Uses It?
- Is PO Box 30425 Salt Lake City Utah Legit? Here’s What You Need to Know
Virginia
Wisconsin
- PO Box 1267 Marshfield WI 54449: Who Sends Mail From It?
- PO Box 2920 Milwaukee WI 53201 Explained | What You Need to Know
Titles that name no city
Box number 4115 also appears under California. If your envelope shows 4115, compare the city, the ZIP code and any Dept line on your envelope with both posts before relying on either.
If your box is not in this directory
Not finding your box is the most common outcome, and it does not mean anything is wrong. Work through it in this order:
- Look for a company name anywhere on the mail. Check the top line of the return address, the fine print at the foot of the letter and any account or reference number. A named company is far easier to verify than a bare box.
- Contact the company through a number you already trust. That means the phone number on your card, your last statement or your insurance ID card, or the company’s official website typed in by hand. A phone number, web address or QR code printed only in the letter is not a trusted route.
- Ask one direct question. Did you send me a letter from this PO box, in this city, and what is it about? A genuine sender can look that up.
- Money waits for confirmation. The safer order is to confirm the sender first, and only then decide whether to cash, pay, sign or return anything.
- Report it if something is off. If a letter pressures you to pay, asks for personal information or looks like fraud, the U.S. Postal Inspection Service reporting page, which we read on September 23, 2026, takes reports of suspected mail fraud, including sweepstakes and lottery scams.
If none of that identifies the sender, “we could not confirm who uses this box” is an acceptable answer. It is better than a guess, and far better than acting on one.
How entries are added and rechecked
This directory grows one way only. A post covering a specific box goes live on this site, and that post then joins the list. A box is never added here on the strength of a search result, a forum thread or a scraped lookup page, and no box appears in the index before its post is published.
The “last checked” date at the top shows when the list was last compared against the live posts. PO boxes change hands, so treat any identification as a starting point and confirm it against the paperwork you actually hold. A stale answer about who sent your mail is worse than no answer at all, because people act on it.
Frequently asked questions
Is there a free PO box lookup directory that shows the owner of any box?
Not an official one. Since a USPS rule change that took effect in 2000, the Postal Service does not release a box holder’s name and address to the general public on request. Directories like this one cover only the boxes their authors have researched, so no single list can answer for every box.
My box number is listed, but the city is different. Is it the same sender?
No. The same box number exists in many cities, and each one is a separate box with its own renter. Only treat an entry as a match when the box number, city and five-digit ZIP code all agree with your envelope.
Does being in this directory mean the mail is safe?
No. An entry describes a box, not the envelope in your hand. Anyone can print a real company’s return address on a fake letter. Confirm the letter by calling the number on your own card, statement or ID card.
Can I mail a claim or a payment to a box listed here?
Use the address printed on your own member ID card, plan documents or billing statement instead. Companies route claims, payments and correspondence to different boxes, and those addresses change. If your paperwork and a web page disagree, your paperwork wins.
