G
George Macdonald
pool.ntp.org.
And if the unit has any country configuration, XX.pool.ntp.org, where XX
is the country code.
If you had read the thread, instead of letting one off, that suggestion had
been made and "pool" is a relatively recent facility, which appears to not
be very well publicized. Also there are routers which only allow a number
to be entered as a target... if they allow anything at all.