How are EASA CZIB numbers structured?

EASA CZIB reference numbers follow the pattern CZIB YYYY-NN-RX, where YYYY is the year of original issuance, NN is the sequential bulletin number for that year, and RX is the revision suffix that increments each time the bulletin is amended or extended (R1, R2, R3, etc.). Examples: CZIB 2026-02-R1 (Iran, issued 16 January 2026); CZIB 2026-03-R6 (Middle East and Persian Gulf); CZIB 2022-01-R12 (Ukraine, currently at revision 12).

CZIBs are advisory by default for EU-registered operators. Each EU member-state national civil aviation authority can convert advisory CZIBs into binding national instructions for carriers under its registry. Non-EU operators follow guidance from their own national authority, which may or may not align with the EASA position.

How long does a typical CZIB stay active?

There is no fixed validity period. CZIBs remain active until formally amended (with a revision suffix), superseded (replaced by a new CZIB number), or withdrawn. Some CZIBs (Ukraine 2022-01) have been progressively revised through more than ten revisions. Others (covering shorter-duration events) have been withdrawn after the underlying conditions changed.

Where is the authoritative current list?

The EASA Conflict Zones Advisories portal at easa.europa.eu/en/domains/air-operations/czibs is authoritative. The portal lists active CZIBs with their current revision numbers and links to the bulletin texts. Revisions are published continuously, so reference numbers may have advanced beyond those shown on this FlySafe page.

What was the first Western Hemisphere CZIB?

CZIB 2026-01, covering Venezuelan airspace (SVZM Maiquetia FIR), was the first ever EASA Conflict Zone Information Bulletin issued for a Western Hemisphere FIR. It was issued in January 2026 and remained active as of April 2026.

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Reference Dataset CC-BY 4.0 Updated April 2026

Notable Historical EASA CZIBs

Reference list of notable EASA Conflict Zone Information Bulletins. The EASA Conflict Zones Advisories portal at easa.europa.eu/en/domains/air-operations/czibs is the authoritative current source. This page summarises notable entries and the format conventions used by EASA.

Last verified:Apr 26, 2026Sources:EASA CZIB · EASA-SAFETY-PUBLICATIONSNext review:May 26

Format Conventions

CZIB reference numbers follow the pattern CZIB YYYY-NN-RX:

YYYY: year of original issuance
NN: sequential bulletin number for that year
RX: revision suffix incrementing with each amendment or extension (R1, R2, R3, etc.)

Example: CZIB 2026-02-R1 = the second CZIB issued in 2026, currently at revision 1. When amended, it becomes CZIB 2026-02-R2, and so on.

Selected Notable CZIBs

Reference	Subject	FIR	Status / latest revision (Apr 2026)
CZIB 2018-01-RX	Saudi Arabia – Jeddah Flight Information Region	OEJD	Active (multi-revision)
CZIB 2022-01-R12	Airspace of Ukraine — multi-FIR closure	UKLV / UKBV / UKDV / UKFV / UKOV / UKBU	Active since Feb 2022
CZIB 2025-01-R2	Airspace of the Russian Federation	UUWV / URRV / USSV / UWWW (selected)	Active
CZIB 2026-01	Venezuela — first ever Western Hemisphere CZIB	SVZM	Active since Jan 2026
CZIB 2026-02-R1	Iran and neighbouring airspace	OIIX	Issued 16 Jan 2026
CZIB 2026-03-R6+	Middle East and Persian Gulf — multi-FIR coverage	Multi-FIR (incl. OIIX, ORBB, OSDI, OYSC, LLLL)	Active, progressively revised

Reference numbers and revisions reflect publicly listed bulletins as of the verification date. The EASA portal is the authoritative source — revisions and supersessions are published continuously.

CZIB Lifecycle Patterns

Long-running bulletins with multi-revision history: CZIB 2018-01 (Saudi Arabia / Jeddah), CZIB 2022-01 (Ukraine — currently at R12 or beyond), and CZIB 2026-03 (Middle East / Persian Gulf — progressively revised through R6+).
Single-issuance bulletins: some CZIBs are issued once and remain at R1 if conditions are stable.
Withdrawal: CZIBs are formally withdrawn when EASA assesses the underlying conditions no longer warrant the bulletin. The withdrawal is published on the EASA portal and communicated to member-state authorities.
Supersession: a CZIB can be superseded by a new bulletin with a different reference number, particularly when the geographic scope is materially changed.

How to Look Up a Specific CZIB

EASA Conflict Zones Advisories portal: easa.europa.eu/en/domains/air-operations/czibs — landing page with active bulletins.
Direct URLs: active bulletins are accessible at easa.europa.eu/en/domains/air-operations/czibs/YYYY-NN-rX (lowercase r in URL path).
Specific subscriptions: EASA offers email notifications on specific CZIBs through the "Stay informed" portal.
National CAA mirroring: many EU member-state CAAs republish active CZIBs on their national portals, sometimes with national binding instructions attached.

Guide

How EASA CZIB Process Works

Guide

How to Read a CZIB

Dataset

Closures Timeline 2014–2026

Dataset

Historical FAA SFARs

EASA CZIBs Reference — FAQ

Common search queries answered with current status, FIR codes, and source citations.

How are EASA CZIB numbers structured?: EASA CZIB reference numbers follow the pattern CZIB YYYY-NN-RX, where YYYY is the year of original issuance, NN is the sequential bulletin number for that year, and RX is the revision suffix that increments each time the bulletin is amended or extended (R1, R2, R3, etc.). Examples: CZIB 2026-02-R1 (Iran, issued 16 January 2026); CZIB 2026-03-R6 (Middle East and Persian Gulf); CZIB 2022-01-R12 (Ukraine, currently at revision 12).
Are CZIBs binding?: CZIBs are advisory by default for EU-registered operators. Each EU member-state national civil aviation authority can convert advisory CZIBs into binding national instructions for carriers under its registry. Non-EU operators follow guidance from their own national authority, which may or may not align with the EASA position.
How long does a typical CZIB stay active?: There is no fixed validity period. CZIBs remain active until formally amended (with a revision suffix), superseded (replaced by a new CZIB number), or withdrawn. Some CZIBs (Ukraine 2022-01) have been progressively revised through more than ten revisions. Others (covering shorter-duration events) have been withdrawn after the underlying conditions changed.
Where is the authoritative current list?: The EASA Conflict Zones Advisories portal at easa.europa.eu/en/domains/air-operations/czibs is authoritative. The portal lists active CZIBs with their current revision numbers and links to the bulletin texts. Revisions are published continuously, so reference numbers may have advanced beyond those shown on this FlySafe page.
What was the first Western Hemisphere CZIB?: CZIB 2026-01, covering Venezuelan airspace (SVZM Maiquetia FIR), was the first ever EASA Conflict Zone Information Bulletin issued for a Western Hemisphere FIR. It was issued in January 2026 and remained active as of April 2026.