When a string of calls shows up from a shifting prefix like 017 to 018, it usually points to a bulk‑dialing operation that swaps digits to dodge filters. The pattern of dozens of numbers suggests a robocall or harassment campaign rather than a single rogue line. Block each offending number, but also add the whole prefix range to your call‑blocking app to stop the next batch. Report the activity to your carrier and, if it persists, consider filing a complaint with the communications regulator. Keep a log of timestamps and any recorded messages – they can be useful if you need to pursue legal action.
Initially, the calls I received came from numbers beginning with 017 rather than 018, but they were the same callers. I got at least twenty different 017‑prefix numbers, so I expect a similar pattern with 018 numbers. The number of the day is 0100181114.
