How to get a Walmart verification code in 3 steps
Go to asms.ai and browse the live number list. If Walmart asks for a US phone number, which it does for domestic accounts, filter the list to US numbers. You will see the full number, the country flag, and recent message activity so you can pick one that is actively receiving SMS.
Copy the number and paste it into the Walmart phone verification field during sign-up, account recovery, or Walmart Pay setup. Submit the form to trigger the SMS from Walmart's system.
Switch back to the number's inbox page on asms.ai. Within a few seconds, Walmart's verification code appears in the public inbox. Copy it, enter it on Walmart, and the verification is complete.
Nothing to install, no email address to provide, and no password to set. The number belongs to a shared pool, so every visitor can read messages sent to it. That is intentional: the code arrives fast, expires quickly, and you never need to interact with that number again.
Is it genuinely free?
Yes. Every shared number on asms.ai is free to use with no hidden charges. You do not need a credit card, a PayPal account, or any other payment method. The service is funded by users who upgrade to private numbers or the developer API, not by advertising.
Private numbers are available as a paid option for anyone who needs an inbox only they can see, or who needs reliable SMS reception over a longer period. For a single Walmart account verification, the free shared tier is all you need.
There are no per-message fees, no download charges, and no subscription to remember to cancel. Use the service once or return whenever you need another verification.
Why use a temporary phone number for Walmart
A phone number is a persistent identifier. Once Walmart stores yours, it can flow into marketing lists, robocall pools, and the third-party data-broker networks that Walmart's privacy terms permit sharing with partners. Using a temporary number for Walmart sign-up breaks that chain entirely.
Some users have already given Walmart a number tied to a previous account they no longer control. Rather than going through carrier-level account recovery, starting fresh with a disposable number is far simpler.
Others apply strict compartmentalisation: a separate number for banking, a separate number for retail, a separate number for social platforms. A shared SMS inbox handles the retail tier without touching anything personal or permanent.
Travellers creating a US Walmart account from abroad face a specific problem: a foreign SIM card does not always receive SMS from a US short code, and international roaming adds delays. A US number from asms.ai receives that message instantly, regardless of which country you are sitting in.
There is also the dual-SIM user whose two slots are occupied, the eSIM device owner who cannot easily add a third line, and the person setting up a household account for a family member. In each case, a free temporary number removes the friction entirely.
Privacy and security: what you should know
Shared numbers are public by design. Every message sent to a shared inbox is visible to all visitors. For a one-time verification code that expires within minutes and becomes worthless once redeemed, that visibility is not a meaningful risk. Do not, however, use a shared number for any ongoing communication you want kept confidential.
asms.ai does not require you to log in, so there is no user profile to link back to you. You visit the inbox page, read the code, and leave. Inboxes are periodically wiped, removing old messages and keeping the pool tidy. If you need to verify a Walmart account again later, simply pick a current number from the live list.
One honest caveat: Walmart, like many large retailers, maintains a blocklist of known shared-number ranges. If the number you choose is on that list, the verification SMS will not arrive or Walmart will display an error. The fix is straightforward: go back to asms.ai, choose a different number, preferably from a different carrier prefix, and try again. New numbers are added daily, so a fresh range is almost always available.
If confidentiality matters more than cost, asms.ai's paid private numbers give you a dedicated inbox that no other visitor can read.
Practical benefits at a glance
No personal data exposure: your real mobile number never enters Walmart's database or its partner network.
No SIM required: works on any device with a browser and an internet connection, including laptops, tablets, and desktop PCs.
Real-time delivery: the shared inbox updates as soon as the SMS arrives, so you are not sitting through a delayed message.
Multiple accounts: each household member or business entity can be verified with a different shared number, since each number has its own inbox.
No commitment: you are not registering for anything. There is no account to deactivate, no data to delete, and nothing to opt out of later.
International access: US numbers for Walmart US accounts, UK and European numbers for Walmart's international properties and affiliated services like Walmart-connected marketplaces.
What if Walmart blocks the number?
It happens, and it is worth knowing how to handle it rather than giving up. Walmart's fraud-prevention systems flag shared number ranges that have been used to create many accounts in a short period. When that happens, submitting the number either returns an error instantly or the SMS simply never arrives.
The approach that works: wait about 60 seconds to confirm the SMS is not just delayed, then return to asms.ai and select a different number. Numbers from a different prefix or a different country (if your account type permits it) are most likely to be clean. Because new numbers are added daily, fresh ranges are continually entering the pool. Most users find a working number within two or three attempts.
If you need guaranteed delivery for business or testing purposes, asms.ai's private number tier and REST API give you a dedicated number that is not shared with anyone else, eliminating the blocklist problem entirely.
Other platforms you can verify with a free number
The same shared numbers work across hundreds of services. Common uses include verifying accounts on Amazon, eBay, AliExpress, Shein, Temu, Google Voice, Facebook, Instagram, WhatsApp, Discord, Telegram, Uber, DoorDash, and many more.
If you need to test an SMS verification flow inside your own application, asms.ai also provides a REST API and a native MCP server built specifically for AI agents and automated workflows. Developers and QA engineers use it to run sign-up flows in staging environments without consuming real SIM allocations or burning time on manual steps.
The free shared numbers cover casual, one-off verification. The paid API tier covers higher-volume, automated, or confidential use cases where programmatic access and a private inbox are necessary.
Availability and reliability
asms.ai has operated since 2018, originally under the AnonymSMS name, and migrated to the asms.ai domain as the platform matured and expanded. The number pool spans multiple countries and carrier prefixes, with daily additions to stay ahead of platform blocklists.
The inbox pages load quickly and update without a full page refresh. No JavaScript framework or native app is required on your end. If a number does not receive an SMS from Walmart within 30 to 60 seconds, that number has likely been flagged by Walmart's systems. Switching to another number and retrying is the correct response and usually resolves the issue immediately.
Keeping the free tier fast and the number pool fresh is the top operational priority. Revenue from private numbers and the developer API funds the infrastructure that makes the free tier reliable for everyone who uses it.