Guilford CT zip code serves as the primary postal identifier for residents and businesses in this scenic New Haven County town. Understanding the correct code and related details helps streamline mail delivery, online forms, and local navigation.
Below is a structured overview of key postal and location details associated with Guilford, Connecticut.
| Location | County | Time Zone | Area Code | ZIP Code |
|---|---|---|---|---|
| Guilford, CT | New Haven County | Eastern Time | 203 | 06437 |
Historical Context of Guilford CT ZIP Code
The Guilford CT zip code 06437 was introduced as part of the national ZIP system established to improve mail sorting efficiency. This standardized numeric code has remained stable, reflecting the town's consistent postal identity over decades.
Residential and Business Address Use
For mailing purposes, 06437 is the designated code for all residential streets and commercial properties within Guilford's official boundaries. When entering address data online or on forms, using this five-digit code ensures accurate routing and faster delivery.
Delivery and Service Coverage
Local post offices and carrier routes operating under 06437 handle standard first-class letters, packages, and media mail. Understanding this code is useful when scheduling pickups, tracking shipments, or setting up package forwarding within Guilford.
Geographic and Digital Relevance
Beyond physical mail, the Guilford CT zip code appears in GPS coordinates datasets, property listings, and demographic reports. Real estate platforms, census data, and emergency service systems often rely on this code for location precision.
Practical Takeaways for Guilford CT ZIP Code
- Always use 06437 for all mail and online address fields within Guilford.
- Verify the code during move-in paperwork, e-commerce checkouts, and service registrations.
- Share the exact ZIP with couriers and delivery apps to prevent routing errors.
- Keep official documents and receipts displaying the ZIP code for reference and fraud prevention.
FAQ
Reader questions
What is the ZIP code for Guilford, Connecticut?
The standard ZIP code for Guilford, Connecticut is 06437.
Does different neighborhoods in Guilford have separate ZIP codes?
No, Guilford uses a single primary ZIP code, 06437, for all residential and business addresses within town limits.
Can I use nearby ZIP codes if I am mailing to Guilford?
Using 06437 is recommended; nearby codes may route through alternate centers and delay delivery to local recipients.
Why does my online form reject the Guilford ZIP code?
Some forms require exact format validation; ensure there are no extra spaces, and enter 06437 as a five-digit numeric value without dashes or letters.