51.36.64.0/18

Currently announced by AS43766 Zain KSA, in the routed prefix 51.36.64.0/18.

Current ASN: AS43766; Zain KSA
Routed prefix: 51.36.64.0/18; Most specific route covering this prefix
ASNs over time: 1; 2 announcement records
RIR allocation: RIPENCC; Saudi Arabia · 51.36.0.0/16

Routing data · Nov 2, 2026, 02:24 UTC

ASN historyEvery routed prefix covering 51.36.64.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
51.36.64.0/18	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.0.0/16	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped

More specific routes58 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
51.36.64.0/22	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.64.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.66.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.68.0/22	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.68.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.70.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.72.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.74.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.76.0/22	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.76.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.78.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.80.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.82.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.84.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.86.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.92.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.94.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.96.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.98.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.100.0/22	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.100.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.102.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.102.0/24	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.103.0/24	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.104.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.106.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.108.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.110.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.112.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.114.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.116.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.118.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.120.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.122.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.124.0/22	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.124.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.126.0/23	AS43766	Zain KSA	Saudi Arabia	Before monitoring	2026-11-02 02:24	Announcing
51.36.64.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.65.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.66.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.76.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.77.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.78.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.79.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.92.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.93.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.94.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.95.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.100.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.101.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.112.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.113.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.114.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.115.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.124.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.125.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.126.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped
51.36.127.0/24	AS43766	Zain KSA	Saudi Arabia	2026-10-25 10:20	2026-11-01 16:26	Stopped

Change logAll changes

The routes covering this address have had no origin changes since ASNBase started monitoring.

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RIR allocation record

Registry: RIPENCC
Allocated block: 51.36.0.0/16
Country: Saudi Arabia
Allocation date: 1993-09-01
Status: assigned

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

How monitoring works

Every 2 hours ASNBase takes the bgp.tools global routing table (prefix → origin ASN) and compares it with the previous one. The detected time is the time of that comparison; the actual change can be up to about 2 hours earlier.
Only routes seen by more than 100 bgp.tools peers are listed as changes; routes with less visibility are only kept in the history.
A new announcement counts only if it is still in the next routing table, and a withdrawal only if the prefix is missing from two tables in a row, so short flaps are ignored.
ASNBase has been monitoring since 2026-10-19. “Before monitoring” under “First seen” means the route was already announced when monitoring started; the earlier date is unknown.
Prefixes first seen during the first day of monitoring do not count as new announcements: most of them were simply missing from the table at the moment monitoring started.
Countries and regions follow the ASN’s registration, not the actual location of the IP addresses.