★★★★★
The app stopped syncing after the last update and support took a week to reply. We lost orders during the outage and had to switch to a competitor.
Ultimate Postal Code Blocker
by MSM TECHNOLOGIES
Block Costly Undeliverable Postal Codes in Real Time at Checkout. On Any Store Plan.
- Rating
- 3.8
- Reviews
- 5
- Pricing from
- $8.08/mo
- Launched
- Nov 2024
First seen 18 Sep 2026 · Data updated 1 week ago
Worst recent reviews
1- and 2-star reviews reveal what this app gets wrong: the gaps a competitor could fill.
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.
Highlights
- 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.
Languages
English