Chelmsford is located in Chelmsford, Essex, United Kingdom, with 1446 postal codes indexed. This page provides a complete postal code list and a mock phone number generator based on local dialing rules.
Postal Codes Directory
The following postal codes are indexed for this geographical region.
Random Local Phone Numbers
Mock phone numbers matching local formatting and dialing area codes. (1245) — Essex
Frequently Asked Questions
How many postal codes are indexed in this area (Chelmsford)?
There are currently 1446 unique postal codes indexed for this city. The registered list includes: CM1 9FX, CM1 9GZ, CM1 9HH, CM1 9HY, CM1 9JZ, CM1 9LQ, CM1 9LR, CM1 9NY, CM1 9PA, CM1 9PB, CM1 9SA, CM1 9SB, CM1 9SD, CM1 9SE, CM1 9SF, CM1 9SG, CM1 9SH, CM1 9SJ, CM1 9SL, CM1 9SP, CM1 9SQ, CM1 9SR, CM1 9SS, CM1 9ST, CM1 9SU, CM1 9SW, CM1 9SX, CM1 9SY, CM1 9SZ, CM1 9TA, CM1 9TB, CM1 9TD, CM1 9TE, CM1 9TF, CM1 9TG, CM1 7DB, CM1 7DD, CM1 7DE, CM1 7DF, CM1 7DG, CM1 7DH, CM1 7DJ, CM1 7DN, CM1 7DP, CM1 7DQ, CM1 7DR, CM1 7DS, CM1 7DT, CM1 7DU, CM1 7DW, CM1 7DX, CM1 7DY, CM1 7DZ, CM1 7EA, CM1 7EB, CM1 7ED, CM1 7EE, CM1 7EF, CM1 7EH, CM1 7EJ, CM1 7EL, CM1 7EN, CM1 7EP, CM1 7EQ, CM1 7ER, CM1 7ET, CM1 7EU, CM1 7EW, CM1 7EX, CM1 7EY, CM1 7EZ, CM1 7FG, CM1 7FH, CM1 7GB, CM1 7GD, CM1 7GE, CM1 7GU, CM1 7HA, CM1 7HB, CM1 7HD, CM1 7HE, CM1 7HF, CM1 7HG, CM1 7HH, CM1 7HN, CM1 7HP, CM1 7HQ, CM1 7HR, CM1 7HS, CM1 7HT, CM1 7HU, CM1 7HW, CM1 7HX, CM1 7HZ, CM1 7JB, CM1 7LE, CM1 7LF, CM1 7NS, CM1 7NT, CM1 7NU.
What is the phone number format and dialing rules for this area (Chelmsford)?
Local phone numbers follow the dialing prefix rules. Numbers generated locally are 11 digits long and utilize regional area codes: 1245.
Local Dialing: Within the same area, dial the standard subscriber number directly without country prefix.
International Dialing: To dial internationally, prepend the country dial code followed by the local area code and number.
Local Dialing: Within the same area, dial the standard subscriber number directly without country prefix.
International Dialing: To dial internationally, prepend the country dial code followed by the local area code and number.
What can the simulated phone numbers generated here be used for?
They are simulated data designed specifically for software development testing, QA automation workflows, form input validation (e.g., formatting mobile/landline numbers), and international compliance mock databases. Simulated phones cannot make or receive calls, nor can they receive SMS verification codes, and they cannot be used to dial real numbers.
How to verify the accuracy of the postal code data for this area (Chelmsford)?
You can double-check accuracy via the official query portals provided by the official postal reference sources below (such as China Post or US USPS). Our website data is periodically synchronized with these officially published directories to ensure the accuracy and timeliness of the basic codes and regional mapping data.
Data Verification & Reference Sources
The following official postal authorities can be used to verify the accuracy of the postal code data on this page: