# USPS Mailbox, San Francisco: a shipping and mailing service in San Francisco (2026 guide) Source: Local AI Registry, https://localairegistry.com/biz/ca/san-francisco/usps-mailbox-san-francisco-ca. Free to reuse with a link back. By Steve Lee, founder and CEO of Local AI Registry. Fact-checked against 1 source. Updated 2026-10-22. Owner review: not yet. Canonical: https://localairegistry.com/biz/ca/san-francisco/usps-mailbox-san-francisco-ca ## In short Located at 3100 16th St in San Francisco, this USPS Mailbox offers a simple yet essential service for the community. With a solid rating of 4 from local users, it features two blue metal mailboxes that stand out on the street. While it may not be a traditional storefront, it serves as a reliable drop-off point for mail, with a convenient pickup time of 5 PM on weekdays. This straightforward service is appreciated by those who need to send letters and packages in the bustling city. Every fact on this page carries one of three marks: Confirmed (from their website, Google Business Profile, review sites, licensing boards, or measured by Local AI Registry), Visitor submitted (added by a person, with a date and how they know), or AI guess (what AI engines like Gemini, ChatGPT and Perplexity are saying, not confirmed by anyone). Every mark points to a reference at the end of this page. ## Key facts | Fact | Value | | --- | --- | | Type | Shipping and mailing service | | Address | 3100 16th St, San Francisco, CA 94103, USA | | Hours | Nothing found | | Phone | Nothing found | | Owner | Nothing found | | Rating | 4.0 across 2 reviews on Google | | Known for | Nothing found | | Prices | Nothing found | | Quietest time | Nothing found | | Parking | Nothing found | | Last verified | August 11, 2026, 5:19 PM | ## All the details Every row is something the owner can add or correct. Each one is marked Confirmed, Visitor submitted or AI guess, with where it came from. | Group | Fact | Value | Mark | Evidence | | --- | --- | --- | --- | --- | | Location info | Address | 3100 16th St, San Francisco, CA 94103, USA | Confirmed | Google Business Profile, checked Aug 11, 2026 | | Location info | Description | 3100 16th St, San Francisco, CA 94103 | Confirmed | Google Business Profile, checked Aug 11, 2026 | | Location info | Name | USPS Mailbox | Confirmed | Google Business Profile, checked Aug 11, 2026 | ## Services and prices Services not read yet, back on Scan Day. ### Known for Nothing found ## The team Nothing found ## Visiting USPS Mailbox Address: 3100 16th St, San Francisco, CA 94103, USA. (Confirmed, Google Business Profile, checked August 11, 2026 at 5:19 PM.) ### Location info from Google Business Profile Business description, written by USPS Mailbox on its Google Business Profile: "3100 16th St, San Francisco, CA 94103" ### When to go Busy times not read yet, back on Scan Day. ### Parking and getting in Nothing found ### Nearby | Place | Type | Distance | | --- | --- | --- | | Foodhall | Grocery store | 1 min walk | | Rudi’s Sports Bar | Sports bar | 1 min walk | | 16th St & Valencia St | Transit station | 1 min walk | | 16th St & Valencia St | Bus stop | 1 min walk | | Detroit Square Pizza | Pizza restaurant | 1 min walk | | Picaro | Spanish restaurant | 1 min walk | ## Reputation 4.0 average across 2 reviews: Google 2. (Confirmed, read August 11, 2026.) Not enough review detail to summarise confidently. (AI guess, from 2 reviews.) ### What people like Nothing found ### What people do not like Nothing found ### Press No press story about USPS Mailbox found yet. ### Awards None named yet. ### Directories Directory listings not read yet. ## Recent updates from USPS Mailbox USPS Mailbox hasn't posted an update here yet. ## Questions people ask ### where exactly is USPS Mailbox in San Francisco? No answer yet ### which one, USPS Mailbox or The UPS? No answer yet ### do I need to book USPS Mailbox or can I just turn up? No answer yet ### Somewhere to park near USPS Mailbox? No answer yet ### What is the main feature of this place? No answer yet ### how much is a first visit around here No answer yet ### opening hours here, what are they these days? No answer yet ### last update from here was when? No answer yet ### best shipping and mailing service in San Francisco No answer yet ## What AI gets wrong about USPS Mailbox We ask Gemini, ChatGPT and Perplexity about USPS Mailbox. These are the answers that disagree with the record. ChatGPT and Gemini, read by Local AI Registry on Oct 21, 2026. ChatGPT and Perplexity via DataForSEO on Oct 21, 2026. No capture has disagreed with the record yet. ## The AI Score: 23 of 100 The AI Score measures how likely AI engines are to recommend a business, and how accurately. San Francisco shipping and mailing services run 22 to 62. Fair starts at 45, good at 65. USPS Mailbox scores 23, below the San Francisco average of 39. The same method scores every business on the registry. | Signal | Weight | Score | What it measures | USPS Mailbox | | --- | --- | --- | --- | --- | | Retrieval grounding | 26 | Does not apply | Whether you appear in the ranked results AI retrieves and cites: AI-Overview citations, organic top-10 for your money queries, and the Bing index ChatGPT leans on. | This signal reads a website, and the record holds none. | | Off-property attestation | 20 | 39 | Volume and consistency of what others say about you: YouTube mentions, branded web mentions, third-party “best-of” lists. The cause of retrievability. | Poor | | AI visibility | 14 | 7 | Whether ChatGPT, Gemini, Perplexity, and AI Overviews name you, and whether they name you for the right service. | Named in 2 of 27 answers that recommended anyone. 12 more named nobody, which is not a loss and is not scored. | | Reviews & response | 12 | 20 | The star average is only one input. We also read volume, velocity, the specificity of review language, and response cadence. Specific reviews are what AI quotes verbatim. | Poor | | Backlink & citation authority | 8 | Does not apply | Domain authority and editorial quality of the sources that attest to you. | This signal reads a website, and the record holds none. | | Google Business Profile | 8 | 43 | Required and recommended fields; update cadence. The listing AI pulls from first. | Poor | | Speed & mobile | 7 | Does not apply | Core Web Vitals at the 75th percentile, on a real phone. | This signal reads a website, and the record holds none. | | Content freshness & schema | 5 | Does not apply | Crawl recency, intent alignment, valid JSON-LD, canonicals. | This signal reads a website, and the record holds none. | Full method: https://localairegistry.com/methodology ## How AI decides what to tell you about a shipping and mailing service When you ask ChatGPT, Gemini or Google about a local business, the AI doesn't visit it. It reads what's already written about it: the business's website, its Google Business Profile, review sites, news stories and directories like this one. Then it repeats what those sources agree on. That's why AI gets small facts wrong. If Yelp says a place is open Mondays and the website says it isn't, the AI has to pick one. The table above shows the answers that disagree with the record today. The more sources agree, and the more specific they are, the more confidently AI recommends a business. A review that names who helped and what they did tells an AI far more than one that says "great place." ## How to choose a shipping and mailing service in California, with or without AI A few checks take ten minutes and tell you more than any rating. - Check that the hours and phone number match on Google, Yelp and the business's own website. Mismatches are how people end up at a locked door. - Read reviews that name a person and what they did. Vague praise is easy to fake. - Look for recent reviews and recent posts. A page nobody has touched in a year may not match the business today. - Ask for the price before you go, and ask what it includes. - Where the work needs a license, ask whose license it is and look it up with California. ## How to read the marks on this page - Confirmed (solid circle): from a known source. The business website, its Google Business Profile, review sites like Yelp, Healthgrades and RealSelf, a licensing board, or measured by Local AI Registry. - Visitor submitted (hollow circle): added or corrected by a person, with the date and how they know, like a phone call or a visit. - AI guess (hollow triangle): what AI engines are saying right now. Nobody has confirmed it. ## About the author Steve Lee is the founder and CEO of Local AI Registry and sets its editorial standards. He is a former Google executive in Search and a former Microsoft executive, with more than 20 years in digital: search, local discovery, and how people find businesses online. He is based in Irvine. - Expertise: search at Google and Microsoft, AI search, answer engine optimization, generative engine optimization, local SEO, structured data and entity mapping. - Industry: medical aesthetics, injectables, med spa operations and marketing. - Disclosure: Local AI Registry sells services to business owners, including USPS Mailbox if it claims this page. That does not change what this page says. Every fact carries its source. ## Entity map Every person, place, organization and treatment named on this page, with a stable ID and a public reference. The JSON-LD below connects them to each other. | Entity | Type | ID on this page | Same as | Relationship to USPS Mailbox | | --- | --- | --- | --- | --- | | USPS Mailbox | LocalBusiness | #business | Nothing found | Subject of this page | | San Francisco, California | City | #city | Nothing found | City USPS Mailbox is in | | Local AI Registry | Organization | #publisher | https://localairegistry.com | Publisher of this page | | Steve Lee | Person | #author | https://localairegistry.com/team | Author of this page | ## Topical map Where this page sits in the registry. It's one profile among the shipping and mailing services in San Francisco, linked to the lists and towns around it. ### Lists - Best shipping and mailing services in San Francisco: https://localairegistry.com/leaderboards/ca/san-francisco/shipping-and-mailing-service - Best businesses in San Francisco: https://localairegistry.com/leaderboards/ca/san-francisco ### Nearby - /los-angeles: https://localairegistry.com/leaderboards/ca/los-angeles - /san-jose: https://localairegistry.com/leaderboards/ca/san-jose - /san-diego: https://localairegistry.com/leaderboards/ca/san-diego - /irvine: https://localairegistry.com/leaderboards/ca/irvine - /fresno: https://localairegistry.com/leaderboards/ca/fresno - /palo-alto: https://localairegistry.com/leaderboards/ca/palo-alto ### Every list - Every leaderboard in California: https://localairegistry.com/leaderboards/ca ## Frequently asked questions ### What is AI search optimization for local business? Getting a business named when a neighbor asks ChatGPT, Gemini, or Perplexity for a recommendation. Some call it AI SEO, some call it generative engine optimization. Traditional SEO fights for ten blue links; this fights for the one answer an assistant says out loud. The AI Score on this page measures the eight signals that drive it. ### What is Local AI Registry? The public record of how AI sees local business. We score every business we list by one published method, we keep the questions people ask about it in one place, and we never sell rank. Looking up any business here is free. ### How does this page help a business get recommended by AI? Assistants read public pages before they answer. This one states what the business does, what people ask about it, and what the Record answers, in one place a machine can read. Correcting what is wrong here changes what an assistant repeats next. ### Who writes the answers here? Registry AI writes the first answer under every question, from the Record and the public sources named beneath it. Neighbors write the rest under pseudonyms. A registered owner can reply as the business, and their reply says so. ### I own USPS Mailbox. How do I fix something or rank higher? Register the page. It is free, it takes about five minutes, and it lets you correct the Record and reply as the business. Nothing on this page is for sale, so the only thing that moves the score is the work. ## References ### Sources cited - [1] Google Business Profile, https://www.google.com/maps/place/?q=place_id:ChIJ54ZVM61_j4AResWPE8nAA70 (accessed Aug 11, 2026)