1. First Postal Service was started in - 1837.
2. First All-India Postal Stamp was issued - 1854.
3. First Postal Department was opened - 1854.
4. First Money Order was started in - 1880.
5. Total number of Postal Zones - 9.
6. First Air-Mail Service was first operated at Allahabad & Nainital - 1911.
7. Pincode was started in the year - 1972.
Pincode Zones and their Jurisdiction
Zone No. 1 - Delhi, Haryana, Punjab, Chandigarh, Himachal Pradesh, Jammu & Kashmir
Zone No. 2 - Uttar Pradesh
Zone No. 3 - Rajasthan, Gujarat, Daman & Diu, Dadra & Nagar Haveli
Zone No. 4 - Maharashtra, Goa & Madhya Pradesh
Zone No. 5 - Andra Pradesh and Karnataka
Zone No. 6 - Tamil Nadu, Kerala & Lakshadweep
Zone No. 7 - West Bengal, Orissa, Arunachal Pradesh, Assam, Manipur,
Meghalaya, Nagaland, Tripura and Andaman & Nicobar Islands
Zone No. 8 - Bihar.
Zone No. 9 - Army Post office (APO) and Field Post office (FPO).