Ultimate Postal Code Blocker

Prevent unwanted deliveries by blocking specific postal codes

by MSM TECHNOLOGIES · Launched: November 2024

5.0 (3) on Shopify Built for Shopify

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Block Costly Undeliverable Postal Codes in Real Time at Checkout. On Any Store Plan.

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About Ultimate Postal Code Blocker

Stop expensive shipping mistakes before they start. Ultimate Postal Code Blocker scans the address field in real time and rejects high-cost or undeliverable postal codes—no Carrier Calculated Shipping required. Compatible with all store plans, it handles thousands of codes or more, providing real-time protection. Reduce losses, protect your brand, and navigate tough areas effortlessly. Auto-block undeliverable postal codes at checkout. Eliminate time, effort, and costs resolving address issues after purchase. Works on all Store plans. No Carrier Shipping needed. Simple installation with seamless integration—minimal setup needed. Block thousands of codes or more. Show more Show less

Last verified: July 17, 2026 · Fresh

App details

Developer: MSM TECHNOLOGIES
Category: Marketing & conversion
Pricing: Paid
Launched: November 2024
Rating: 5.0 (3) on Shopify

Key features

Stop high-cost postal codes in real-time
Setup in a few clicks
Customize your blocking message
Handle 1000+ codes with ease
Advanced Settings at your fingertips

Integrations with:

Checkout, Shopify Admin

2 plans · 30-day free trial

Pro Monthly Plan

$8.99/month

Pro Yearly Plan

$96.99/year

Plans and prices as listed on the Shopify App Store.

Ratings & reviews

based on 3 Shopify App Store reviews

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This app is working well for our business. We had some minor issues with the initial integration but the app owner had zero issue helping to resolve the problems.

— Quick Tub

Works perfectly, The CSV I uploaded initially contained too much information so a good tip is to only include the postal codes you need blocked and not adding the city name in a separate column as this caused the entire city to be blocked for myself. Contacted their help and received a phone call within 10 minutes as their emails weren't going through but I had managed to fix the issue myself as t...

— Royalcraft

Very easy to install. I was looking for an app that would allow me only to send to the major cities in Canada so I didn't receive unexpected remote delivery charges. The developer quickly added a whitelist option to the whole country blocking, which was a very quick and elegant solution.

— Vermilion Jewellery

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