Calls from 01858 400 XXX — Market Harborough
Block 01858 400 XXX is allocated by Ofcom to Linear Telecoms Limited, on the Market Harborough exchange (allocated 2010).
01858 400 XXX is a number block in Market Harborough, in the historic county of Leicestershire, an area with a population of approximately 24,316. Standard landlines in this area use the format 01858 400123, with the first part being the dialling code and the rest being the local number.
This block — 01858 400 XXX — was allocated by Ofcom to Linear Telecoms Limited in 2010. Linear Telecoms Limited either operates the numbers directly or sub-allocates them to resellers and downstream carriers, which is why a single 01858 400 XXX prefix can be used by many different organisations. You can verify any allocation against Ofcom's National Telephone Numbering Plan, which is updated weekly.
The HMRC-impersonation scam continues to be the most-reported telephone scam in the UK, and blocks like 01858 400 XXX are sometimes spoofed for these calls. HMRC will never threaten arrest, demand payment by gift card or cryptocurrency, or use a 'press 1 to speak to an officer' menu. If in doubt, hang up and contact HMRC on the number printed on their gov.uk page.
If a 01858 400 XXX number called you and you're not sure who it was, the safest steps are: don't return the call until you've verified it (search the full number online first), don't share personal or financial details, and register the number with the Telephone Preference Service (TPS) if it's a marketing call. Persistent unwanted calls can be reported to Ofcom and the ICO. To block a specific number on most UK mobiles and landlines, you can also enable network-level call screening through your provider.
FAQs about 01858 400 XXX
Is 01858 400 XXX a real UK phone number?
Yes. 01858 400 XXX is part of an Ofcom-allocated UK number block — any number starting with that prefix is a real, dialable UK number assigned by Ofcom to Linear Telecoms Limited for use on the UK public telephone network.
Who owns the 01858 400 XXX number block?
01858 400 XXX is currently allocated to Linear Telecoms Limited in Ofcom's National Telephone Numbering Plan. The allocated carrier may operate the numbers directly or sub-allocate them to downstream resellers — both arrangements are normal under UK telecoms rules.
Where is a 01858 400 XXX number based?
01858 400 XXX is associated with Market Harborough. UK geographic numbers historically indicated the location of the line, although VoIP services and number-portability rules mean a 01858 400 XXX number can technically be used anywhere a CP routes it. For most UK landlines the geographic match still holds.
How do I block calls from 01858 400 XXX?
On most UK smartphones, open the recent-calls list, tap the number, and choose 'Block this caller'. UK landlines from BT, Sky, TalkTalk and Virgin Media include free 'BT Call Protect'-style screening you can enable in your provider's app. You can also register your number with the Telephone Preference Service (TPS) at tpsonline.org.uk to opt out of legitimate UK marketing calls.
Other blocks in 01858
Try a different block within the same UK area code:
