Nuisance callwikipedia
Nuisance calls encompass any type of unwanted, unsolicited, telephone call.
nuisance calltelephone harassmentnuisance callsnuisance phone callscalls

Prank call

prank callprank callsprank phone calls
Common types of nuisance calls include prank calls, telemarketing calls, and silent calls.
Rudimentary criminal 'pranks' may range from simple telephone harassment to bomb threats.

Telemarketing

telemarketingtelemarketertelemarketers
Common types of nuisance calls include prank calls, telemarketing calls, and silent calls.

2002 New Hampshire Senate election phone jamming scandal

2002 New Hampshire Senate election phone jamming scandalJames Tobinjamming Democratic Party lines
Verizon was later able to stop most of these calls, but whoever had made them had violated state laws against telephone harassment.

Tsutomu Miyazaki

Saitama serial kidnapping murders of young girls
Police found that the families of the victims had something else in common: all received silent nuisance phone calls.

David Lammy

Parliamentary Under-Secretary of State for Constitutional AffairsDavid Lammy MP
It was the first time a politician had been fined for authorising nuisance calls.

Area code 716

716area code 716(716)
Calls to God may be placed to 776-2323, according to the cinema release of Bruce Almighty; that number was removed from the video release & TV versions as, while it was (and remains) unassigned in Buffalo's area code 716, it was routinely misdialled to other area codes as a nuisance call to actual subscribers.

Denial-of-service attack

denial-of-service attackdenial of servicedistributed denial of service
TDoS differs from other telephone harassment (such as prank calls and obscene phone calls) by the number of calls originated; by occupying lines continuously with repeated automated calls, the victim is prevented from making or receiving both routine and emergency telephone calls.

North American Numbering Plan

Area codeArea codes<span style="white-space:nowrap;">Area code(s)
Conversely, an advantage of caller-pays is the relative absence of telemarketing and nuisance calls to mobile numbers.

Telephone call

telephone callcallphone call
Nuisance calls encompass any type of unwanted, unsolicited, telephone call.

Silent call

silent telephone callssilent call
Common types of nuisance calls include prank calls, telemarketing calls, and silent calls.

Obscene phone call

obscene phone callTelephone scatologiatelephone scatophilia
Obscene phone calls and other threatening calls are criminal acts in most jurisdictions, particularly when hate crime is involved.

Hate crime

hate crimehate crimesracially motivated
Obscene phone calls and other threatening calls are criminal acts in most jurisdictions, particularly when hate crime is involved.

Phone fraud

telephone fraudphone fraudtoll fraud
Unsolicited calls may also be used to initiate telephone frauds.

Fax

faxfax machinefacsimile
Fax machines may also receive junk faxes via unsolicited calls.

Junk fax

junk faxblastfaxing junk fax transmissions
Fax machines may also receive junk faxes via unsolicited calls.

Caller ID

caller IDcaller line identificationCLI
Caller ID provides some protection against unwanted calls, but can still be turned off by the calling party.

Automatic number identification

automatic number identificationANIthe caller's number
Even where end-user Caller ID is not available, calls are still logged, both in billing records at the originating telco and via automatic number identification, so the perpetrator's phone number can still be discovered in many cases.

Caller ID spoofing

caller ID spoofingspoofspoofed
However, these do not provide complete protection: harassers can use payphones and, in some cases, caller ID (but not necessarily automatic number identification itself) can be spoofed or blocked.

Voice over IP

VoIPvoice over IPvoice over Internet Protocol
Voice over IP users may send bogus caller ID or route calls through servers in multiple countries.

Call screening

call screeningscreening callsscreened
Call screening is another countermeasure against unsolicited calls.

Ofcom

OfcomRadio AuthorityOffice of Communications
In the United Kingdom the communication regulator Ofcom offers a service to report on silent calls while the Telephone Preference Service (TPS) allows consumer to register on a do-not-call-list for marketing calls.