What city is ZIP code 06503?

06503 is a New Haven, Connecticut ZIP code.

What county is 06503 in?

ZIP code 06503 is in New Haven County, Connecticut.

What time zone is ZIP code 06503 in?

06503 is in the Eastern Time zone (America/New_York).

What area code is 06503?

Phone numbers in ZIP code 06503 use area code 203.

Can I use 06503 for a street address?

No. 06503 is only for PO Boxes. Street addresses in New Haven use 06510, 06511, 06513.

What ZIP codes are near 06503?

The nearest ZIP codes to 06503 are 06501 (New Haven, 0 miles), 06502 (New Haven, 0 miles), 06505 (New Haven, 0 miles) and 06506 (New Haven, 0 miles).

ZIP code 06503

Where is ZIP code 06503?

New Haven, Connecticut

New Haven County · PO Box only ZIP code

ZIP code 06503 belongs to New Haven, Connecticut in New Haven County. 06503 is a PO Box only ZIP code: it is used for post office boxes at the New Haven post office, not for street addresses. It is in the Eastern Time zone and uses area code 203. The closest ZIP codes are 06501 (New Haven, 0 mi north), 06502 (New Haven, 0 mi north) and 06505 (New Haven, 0 mi north).

ZIP code	06503
Type	PO Box only (no street delivery)
Status	Active
City	New Haven
State	Connecticut (CT)
County	New Haven County
Time zone	Eastern Time · now
Area code	203
Coordinates	41.3082, -72.9282 map
3-digit prefix	065

The Census Bureau doesn’t publish population figures for po box only ZIP codes because nobody lives at a PO Box or a single organization’s address. For figures about the area, see the nearby standard ZIP codes below.

ZIP codes near 06503

ZIP code	City	Distance	Type
06501	New Haven, CT	0 mi N	PO Box only
06502	New Haven, CT	0 mi N	PO Box only
06505	New Haven, CT	0 mi N	PO Box only
06506	New Haven, CT	0 mi N	PO Box only
06507	New Haven, CT	0 mi N	PO Box only
06508	New Haven, CT	0 mi N	PO Box only
06509	New Haven, CT	0 mi N	PO Box only
06512	East Haven, CT	0 mi N	Standard
06520	New Haven, CT	0 mi N	PO Box only
06521	New Haven, CT	0 mi N	PO Box only
06525	Woodbridge, CT	0 mi N	Standard
06530	New Haven, CT	0 mi N	PO Box only

Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 06503 or measure the distance to another ZIP code.

How to address mail to 06503

JANE SMITH
PO BOX 123
NEW HAVEN CT 06503

Put the city, the two-letter state code and the ZIP code on the last line. Avoid N Haven: USPS doesn’t recognize it as the city for this ZIP code. Adding the 4-digit ZIP+4 code (06503-XXXX) helps mail sort faster but isn’t required.

Other ZIP codes in New Haven, CT

All New Haven ZIP codes with population and income →

Questions

What city is ZIP code 06503?: 06503 is a New Haven, Connecticut ZIP code.
What county is 06503 in?: ZIP code 06503 is in New Haven County, Connecticut.
What time zone is ZIP code 06503 in?: 06503 is in the Eastern Time zone (America/New_York).
What area code is 06503?: Phone numbers in ZIP code 06503 use area code 203.
Can I use 06503 for a street address?: No. 06503 is only for PO Boxes. Street addresses in New Haven use 06510, 06511, 06513.
What ZIP codes are near 06503?: The nearest ZIP codes to 06503 are 06501 (New Haven, 0 miles), 06502 (New Haven, 0 miles), 06505 (New Haven, 0 miles) and 06506 (New Haven, 0 miles).