07521321000
Mobile (United Kingdom)
07521321000 is a Mobile phone number assigned to the O2 service provider. This may be one of the rare calls, like an incorrectly dialed number, a call from someone you know or from a company about a service or product you ordered. Leave your report if you still notice anything strange.
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Alternative number formats
The phone number can be identified in different formats such as national, E164 - international standard, RFC3966 - URI standard for telephone numbers.
Searched in the last 24 hours
Most frequently searched (07521) phone numbers in the past 24 hours.
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Recent reports:
Me and and someone I know both got a call from this number. The call was an automated voice message telling both of us that we were under so called “...
Left no message. One of several unknown callers this week. Others were financial scams
Claim to be HM Customs & Revenue…automated message telling me options eg. press one to speak to officer…suspected scam.
Left a voicemail, first part was automated robot voice, “press 1 for English, 2 for Chinese,” then a lady speaking in Chinese. No idea.
this number called claming to be from 3 mobile
Called me then hung up, no speech
potatoes with extra potatoes
Highly suspicious
Hi, ego volo scire vestri pretium.
Called me a nazi for no reason
What is national telephone number format?
A national telephone number is a single telephone number that allows the routing of calls to different
locations within one country. In most cases, a national telephone number consists of 10 digits: a
three-digit area code, and a seven-digit subscriber number.
"0" before number is the
long distance dialling code within the UK.
What is E164 telephone number format?
When calling a country outside of the United Kingdom, you have to call that country's international
access code in order to place an international call.
"+44" is the country calling code assigned to the United Kingdom by the
International Telecommunication Union(ITU) E164 standard. Normally known as the international telephone number format.
What is RFC3966 telephone number format?
RFC3966 is a telephone number URI (Uniform Resource Identifier) standard for
describing resources identified by telephone numbers.
According to RFC3966 document, resources
identified by telephone numbers uses "tel" URI scheme.
E.g. tel:+44-xxx-xxx-xxxx.
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