Sysconfig Ltd in Northern Ireland

About Sysconfig Ltd’s Northern Ireland allocation

When Sysconfig Ltd is the range holder for +44 28 it means Ofcom recorded Sysconfig Ltd as the provider entitled to issue numbers from these blocks when they were first allocated under the UK National Telephone Numbering Plan. 2 Northern Ireland-facing blocks sit against Sysconfig Ltd in the current Ofcom snapshot, each of which can carry up to ten thousand individual digits available for assignment to end customers.

Northern Ireland’s Northern Ireland telecoms estate is shaped by Northern Ireland's catchment of roughly 1,900,000 residents: a dense urban exchange typically hosts allocations from several national operators in parallel, which is why you see Sysconfig Ltd’s blocks alongside other range holders on the same 028 code. Local switching capacity, historic Openreach exchange footprints, and Sysconfig Ltd’s wholesale routing arrangements all influence which blocks land in Northern Ireland rather than elsewhere on the national plan.

Treat this allocation as a starting point, not a verdict on any specific caller. UK numbers are portable, so the current carrier on a given 028 digit string may differ from the range holder shown — read Range Holder vs current provider for the distinction, and How Ofcom allocates UK phone numbers for the wider context behind the table below.