- PIN code
- 421004
- Main post office
- Ulhasnagar 4 (sub office)
- District
- Thane
- State
- Maharashtra
- Postal division
- Thane
- Region and circle
- Navi Mumbai Region, Maharashtra circle
- Delivery
- Delivery PIN (1 of 1 offices delivers)
- Location
- Open on a map (19.211, 73.158)
Post offices with PIN 421004
| Post office | Type | Delivery |
|---|---|---|
| Ulhasnagar 4 | Sub office | Delivers mail |
421004 has a single post office.
What the digits of 421004 mean
- 4: India Post's Western region, which covers Chhattisgarh, Goa, Madhya Pradesh and Maharashtra (2,784 PINs).
- 42: the Maharashtra postal circle; 237 PINs start with 42.
- 421: the sorting district, shared by 30 PINs in 2 districts.
- 004: the delivery post office within it, Ulhasnagar 4.
Head post office for 421004
The post offices with this PIN belong to the Thane postal division, whose head offices are listed below. Money orders, savings accounts and complaints that a sub or branch office cannot settle go to the head office.
- Kalyan City head post office: 421301
- Thane head post office: 400601
Nearby PIN codes in Thane
- Ulhasnagar 5421005
- Ulhasnagar 2421002
- Padgha421101
- Mohone421102
- Shahad421103
- Tilaknagar (Thane)421201
- Vishnunagar421202
- Dombivali I.A.421203
Writing an address with 421004
Put the PIN on the last line, after the town and state, so the sorting machines and postmen can read it:
Name House number, street Ulhasnagar 4 post office Thane, Maharashtra – 421004
Frequently asked questions
Which post office has PIN code 421004?
Ulhasnagar 4 sub office, in Thane district, Maharashtra.
Is 421004 a delivery PIN code?
Yes. Its post office delivers mail; letters addressed to 421004 are delivered.
Which district is 421004 in?
Thane district, Maharashtra. It is in the Thane postal division (Navi Mumbai Region) of the Maharashtra postal circle.
What is the head post office for 421004?
The Thane postal division's head offices are Kalyan City (421301) and Thane (400601).
Sources
Last checked on 6 October 2026. PIN codes and post offices are from India Post’s directory on data.gov.in. Post offices are sometimes opened, merged or renamed; check with India Post before relying on a PIN for an official form.