KNOWNOW INFORMATION LTD Company number 08781104 · Monitor this company Active Overview People 3 Financial Control Documents Analysis Location Related Registered office AddressHalpern House, 1- 2 Hampshire Terrace, Portsmouth, PO1 2QF PostcodePO1 2QF Companies at this postcode 139 Average house price in PO1 2QF £369,000 (23 sales) Map