Screen every incoming call before picking up. If it's from unfamiliar numbers like these that hang up immediately, block them right away to cut down on the hassle. These silent or quick-hangup tactics often signal nuisance calls from telemarketers or automated systems testing active lines. Don't call back— that could invite more spam or even fees. Instead, register your number on a do-not-call list and use apps that flag suspicious callers. Keep a log of patterns, like multiple similar numbers, and report persistent ones to authorities for broader protection. Staying vigilant prevents escalation to real scams.
Multiple calls came from 02 7234 4420, 02 7234 4422 and 02 7234 4426, likely the same business, and each hung up as soon as I answered.
Three frequent callers hung up as soon as I answered; they seem to be coming from the same switchboard.
There is never a message left by this caller