Ultimate Postal Code Blocker

Ultimate Postal Code Blocker

Pricing
From $8.99/month. Free trial available.
Rating
4.2 (8)

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

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.

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. more
  • 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

Works with

Pricing

Choose the plan that best fits your business.

Pro Monthly Plan

$8.99 / month

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
  • Integrate Seamlessly with Shopify
  • Anytime Support

30-day free trial

Pro Yearly Plan

$96.99 / year

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
  • Integrate Seamlessly with Shopify
  • Anytime Support
  • Save 10% yearly

30-day free trial

All charges are billed in USD. Recurring and usage-based charges are billed every 30 days.

Reviews (8)

Overall rating
4.2
Counts per rating level
  • 88% of ratings are 5 stars
  • 0% of ratings are 4 stars
  • 0% of ratings are 3 stars
  • 0% of ratings are 2 stars
  • 13% of ratings are 1 stars
September 22, 2026

Delivery within United States only was on the product pages, the delivery page and the cart. Still got orders for Gloss Drip Lip Gloss from outside our area. Happy to have something that actually catches the postcode before payment. The notices clearly weren’t doing much on their own.

Swanie Store
United States
3 days using the app
Edited September 18, 2026

No funciona.
Instale la aplicacion para filtrar los codigos para que los clientes no eligieran otro metodo y no me funciono, intente 3 veces, la primera vez fue para bloquear todos los codigos diferentes a mi localidad, lo intente con 3 codigos diferentes. Agradezco totalmente que se hayan puesto en contacto, pero tampoco me parece el acoso de una forma un tanto amenazante por parte de sus agentes. Espero que lean la reseña y mejoren la forma en que la aplicacion funciona, al menos con los codigos de mexico no lo pude hechar a funcionar

Boca Rosa
Mexico
27 minutes using the app
MSM TECHNOLOGIES replied September 18, 2026

No tengo ningún agente escribiéndote. Los correos y los WhatsApp que recibiste los escribo yo,
yo mismo. Yo hago estas apps.

Las respaldo. Si algo estaba mal, siempre pudiste escribirme. Te configuro la app, solo dime qué
necesitas.

Corro más de un millón de validaciones al día para comercios. Decir que la app simplemente no
funciona es una afirmación falsa, y no es justo para un trabajo de años.

--

Nuestros registros no muestran ningún intento de configurar la app antes de desinstalarla.

Muchos comercios la utilizan con normalidad. Un bloqueo incorrecto del checkout puede causar pérdidas de ventas, por lo que nos tomamos estos avisos muy en serio. Hemos intentado contactarte varias veces por correo y WhatsApp, pero aún no hemos recibido respuesta. Seguimos disponibles para investigar lo ocurrido y ayudarte con la configuración.

-----

I don't have any agent writing to you. The emails and the WhatsApp messages you received, I
write them, me myself. I make these apps.

I stand behind them. If something was wrong, you could always have written to me. I'll configure
the app for you, just tell me what you need.

I run over a million validations a day for merchants. Saying the app simply doesn't work is a
false claim, and it isn't fair to years of work.

--

Our records show no attempt to configure the app before it was uninstalled.

Many merchants use our app successfully. Incorrectly blocking checkout can lead to lost sales, so we take these reports very seriously. We’ve tried contacting you several times by email and WhatsApp but haven’t received a response. We remain available to investigate what happened and help with setup.

January 23, 2026

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 the app is that easy and intuitive to use

Royalcraft
United Kingdom
33 minutes using the app
MSM TECHNOLOGIES replied February 4, 2026

Thanks for the detailed review. Glad to see that the app is working well for you!

Support

App support provided by MSM TECHNOLOGIES.

Developer

MSM TECHNOLOGIES

1915 rue Poupart, Montreal, QC, H2K3H1, CA

Launched

November 25, 2024

Data access

This app needs access to the following data to work on your store. Learn why in the developer's privacy policy .

View customer data:

Sensitive data, device and activity data

  • Sensitive data

    Physical address

  • Device and activity data

    Geolocation, IP address, browser and operating system, browsing behavior, client ID cookie

View staff and contributor data:

Store owner

  • Store owner

    Name, email address, phone number, physical address

View and edit store data:

Customers, products, orders, store analytics, Shopify Functions

  • View customers

    Browsing behavior

  • View products

    Products, collections

  • View orders

    Shipping information

  • Edit store analytics

    Web pixels

  • Edit Shopify Functions

    Cart and checkout validations, delivery customizations

  • Edit other data

    Locales, translations

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