Yes. Serial numbers use modulo arithmetic. See RFC 1982. The value is just entered as: serial = time % (2^32) with checks to ensure it is monotonically increasing on each change which allows for more than one change per second.
> On 22 Jul 2026, at 03:00, Paul Kosinski via bind-users > <[email protected]> wrote: > > So BIND's UnixTime, being represented in decimal, allows values beyond 2^32-1 > without any problem? > > > On Tue, 21 Jul 2026 18:36:53 +0200 > Ondřej Surý <[email protected]> wrote: > >> Hi Ajay, >> >> switch to unixtime serial number and the problem goes away. You will also get >> a one-second granularity for the updates as free bonus. The YYYYMMDDNN >> only allows 100 updates per-day. >> >> Ondrej >> -- >> Ondřej Surý (He/Him) >> [email protected] > -- > Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from > this list. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: [email protected] -- Visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list.
