Johannesburg, Gauteng
Cosmo City Ext 6 Postal Code
Street code
PO Box code
Cosmo City Ext 6, Johannesburg, Gauteng
Cosmo City Ext 6 is listed under Johannesburg in Gauteng. Its street code is 2188, and no box code. That is not the same as the Johannesburg town code (2001), so use the Cosmo City Ext 6 code on anything going to an address here. Landlines here use the 011 dialling code.
Suburbs sharing a code with Cosmo City Ext 6
| Suburb | Street code | Box code |
|---|---|---|
| Boskruin | 2188 | 2154 |
| Boskruin Ext 1 | 2188 | 2154 |
| Boskruin Ext 10 | 2188 | 2154 |
| Boskruin Ext 11 | 2188 | 2154 |
| Boskruin Ext 12 | 2188 | 2154 |
| Boskruin Ext 16 | 2188 | 2154 |
| Boskruin Ext 18 | 2188 | 2154 |
| Boskruin Ext 19 | 2188 | 2154 |
| Boskruin Ext 2 | 2188 | 2154 |
| Boskruin Ext 26 | 2188 | 2154 |
| Boskruin Ext 27 | 2188 | 2154 |
| Boskruin Ext 3 | 2188 | 2154 |
How to write an address in Cosmo City Ext 6
South Africa uses two kinds of postal code. A street code goes on anything delivered to a physical address, including courier parcels and online orders. A box code goes on post sent to a PO Box or Private Bag at the post office. Using the wrong one can send your post to the wrong sorting office.
Street address
Recipient name12 Example Street
Cosmo City Ext 6
Johannesburg
2188
Post office in Johannesburg
13 branches are listed as active by the South African Post Office. 3 branches are closed or not trading.Status as published in SAPO's branch list of 2026/04; phone before you go.
| Branch | Status | Phone |
|---|---|---|
| Braamfontein | Open | 0113393345 |
| Craighall | Open | 0113254011 |
| Cresta | Open | 0114763916 |
| Crown Mines | Open | 0114950675 |
| Fordsburg | Open | 0118344995 |
| Glenvista | Open | 0114320200 |
| Greenside | Open | 0112742960 |
| Highlands North | Open | 0114402408 |
| Mondeor | Open | 0114335481 |
| Pinegowrie | Open | 0118881732 |
| South Gate | Open | 0119422131 |
| South Hills | Open | 0116138814 |
| Witspos | Open | 0124076406 |
| Industria | Inactive - Not Trading. Nearest alternative: Fordsburg (0118344995) | 0114743087 |
| Lonehill | Inactive - Not Trading. Nearest alternative: Bryanston (0117068784) | 0114656199 |
| Northlands | Inactive - Not Trading. Nearest alternative: Highlands North (0114402408) | 0112681043 |
Full list: every post office branch and its status.
Frequently asked questions
What is the postal code for Cosmo City Ext 6?
Cosmo City Ext 6 in Johannesburg has street code 2188 and box code none listed, according to the South African Post Office.
Which code do I use for a delivery to Cosmo City Ext 6?
Use the street code 2188 for anything delivered to a house or business in Cosmo City Ext 6, including courier and online orders. The box code is only for PO Box and Private Bag addresses.
Which town and province is Cosmo City Ext 6 in?
Cosmo City Ext 6 is listed under Johannesburg, Gauteng.
Which other suburbs share Cosmo City Ext 6's postal code?
Boskruin, Boskruin Ext 1, Boskruin Ext 10, Boskruin Ext 11, Boskruin Ext 12, Boskruin Ext 16, Boskruin Ext 18 and Boskruin Ext 19 share a code with Cosmo City Ext 6.
1047 suburbs
All postal codes in Johannesburg
Postal codes come from the South African Post Office's domestic postal code list, and post office branch status from SAPO's branch list (updated 2026-04-24). Provinces and distances are worked out from GeoNames place data. Spotted a wrong code? Tell us.