Series lifecycle table

Cisco NCS 4000 EOL List

This table tracks end-of-life milestones for 22 Cisco NCS 4000 part numbers. For each record it lists the key dates published in Cisco lifecycle notices: the EOL announcement date, End-of-Sale (EOS), and End-of-Service-Life (EOSL). The Cisco NCS 4000 family has no single end-of-life date; milestones are set per part number, so use the table to find the exact SKU you operate. Across this series, EOSL dates range from 2020-04-30 to 2030-11-30. Open any part number for source details, replacement fields, and current availability options.

22 products

Cisco NCS 4000 Series

Total Products: 22 | Page 1 of 2

Cisco / Cisco NCS 4000

E-NCS4K-6142K9

Cisco E-delivery of XR 6.1.42 for NCS4K

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

E-NCS4K-651K9

Cisco E-delivery of XR 6.5.1 for NCS4K; grants RTU license

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

E-NCS4K-6525K9

Cisco E-delivery of XR 6.5.25 for NCS4K; grants RTU license

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

E-NCS4K-6526K9

Cisco E-delivery of XR 6.5.26 for NCS4K; grants RTU license

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

E-NCS4K-652K9

Cisco E-delivery of XR 6.5.2 for NCS4K; grants RTU license

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

E-NCS4K-FL6-5-26

Cisco NCS 4K Chassis Feature Enablement License - Release 6.5.26

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

NCS4009-FC-S

Cisco NCS 4009 Agnostic Cross connect - Single-chassis

EOL: 2017-12-18
EOS: 2018-12-18
EOSL: 2023-12-31

Cisco / Cisco NCS 4000

NCS4016-FC-M

Cisco NCS 4016 Agnostic Cross connect - Multichassis

EOL: 2018-12-14
EOS: 2019-12-14
EOSL: 2024-12-31

Cisco / Cisco NCS 4000

NCS4K-24LR-O-S

Cisco NCS 4000 24-port Low rate OTN LC - SFP

EOL: 2024-11-18
EOS: 2025-11-18
EOSL: 2030-11-30

Cisco / Cisco NCS 4000

NCS4K-2H10T-OP-KS

Cisco NCS 4000 2x 100G CPAK 10x10G SFP+ OTN/Packet Line Card

EOL: 2024-11-18
EOS: 2025-11-18
EOSL: 2030-11-30

Cisco / Cisco NCS 4000

NCS4K-DC-FA

Cisco NCS 4000 AC Power front connection adapter

EOL: 2023-07-05
EOS: 2024-07-04
EOSL: 2029-07-31

Cisco / Cisco NCS 4000

NCS4K-RP

Cisco NCS 4000 Router Processor and Controller (32G RAM)

EOL: 2020-11-30
EOS: 2021-11-30
EOSL: 2026-11-30

Cisco / Cisco NCS 4000

NCS4K-SSD-200G

Cisco NCS 4000 200G SSD disk for ECU

EOL: 2020-11-30
EOS: 2021-11-30
EOSL: 2026-11-30

Cisco / Cisco NCS 4000

XR-NCS4K-521K9

Cisco NCS 4000 IOS XR Software Release 5.2.1

EOL: 2019-01-15
EOS: 2019-04-16
EOSL: 2020-04-30

Cisco / Cisco NCS 4000

XR-NCS4K-523K9

Cisco NCS 4000 IOS XR Software Release 5.2.3

EOL: 2019-01-15
EOS: 2019-04-16
EOSL: 2020-04-30

Cisco / Cisco NCS 4000

XR-NCS4K-601K9

Cisco NCS 4000 IOS XR Software Release 6.0.1 USB key- RTU License

EOL: 2018-01-15
EOS: 2018-07-16
EOSL: 2023-07-31

Cisco / Cisco NCS 4000

XR-NCS4K-612K9

Cisco NCS 4000 IOS XR Software Release 6.1.2 USB key- RTU License

EOL: 2018-01-15
EOS: 2018-07-16
EOSL: 2023-07-31

Cisco / Cisco NCS 4000

XR-NCS4K-6142K9

Cisco USB Key delivery of XR 6.1.42 for NCS4K

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

XR-NCS4K-651K9

Cisco Delivery of XR 6.5.1 for NCS4K; grants RTU license

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Cisco / Cisco NCS 4000

XR-NCS4K-6525K9

Cisco USB Key delivery of XR 6.5.25 for NCS4K; grants RTU license

EOL: 2025-06-13
EOS: 2026-06-13
EOSL: 2029-06-30

Manufacturer	Part Number	Product Name	EOL Announcement	End of Sale (EOS)	End of Service Life (EOSL)
Cisco	E-NCS4K-6142K9	Cisco E-delivery of XR 6.1.42 for NCS4K	2025-06-13	2026-06-13	2029-06-30
Cisco	E-NCS4K-651K9	Cisco E-delivery of XR 6.5.1 for NCS4K; grants RTU license	2025-06-13	2026-06-13	2029-06-30
Cisco	E-NCS4K-6525K9	Cisco E-delivery of XR 6.5.25 for NCS4K; grants RTU license	2025-06-13	2026-06-13	2029-06-30
Cisco	E-NCS4K-6526K9	Cisco E-delivery of XR 6.5.26 for NCS4K; grants RTU license	2025-06-13	2026-06-13	2029-06-30
Cisco	E-NCS4K-652K9	Cisco E-delivery of XR 6.5.2 for NCS4K; grants RTU license	2025-06-13	2026-06-13	2029-06-30
Cisco	E-NCS4K-FL6-5-26	Cisco NCS 4K Chassis Feature Enablement License - Release 6.5.26	2025-06-13	2026-06-13	2029-06-30
Cisco	NCS4009-FC-S	Cisco NCS 4009 Agnostic Cross connect - Single-chassis	2017-12-18	2018-12-18	2023-12-31
Cisco	NCS4016-FC-M	Cisco NCS 4016 Agnostic Cross connect - Multichassis	2018-12-14	2019-12-14	2024-12-31
Cisco	NCS4K-24LR-O-S	Cisco NCS 4000 24-port Low rate OTN LC - SFP	2024-11-18	2025-11-18	2030-11-30
Cisco	NCS4K-2H10T-OP-KS	Cisco NCS 4000 2x 100G CPAK 10x10G SFP+ OTN/Packet Line Card	2024-11-18	2025-11-18	2030-11-30
Cisco	NCS4K-DC-FA	Cisco NCS 4000 AC Power front connection adapter	2023-07-05	2024-07-04	2029-07-31
Cisco	NCS4K-RP	Cisco NCS 4000 Router Processor and Controller (32G RAM)	2020-11-30	2021-11-30	2026-11-30
Cisco	NCS4K-SSD-200G	Cisco NCS 4000 200G SSD disk for ECU	2020-11-30	2021-11-30	2026-11-30
Cisco	XR-NCS4K-521K9	Cisco NCS 4000 IOS XR Software Release 5.2.1	2019-01-15	2019-04-16	2020-04-30
Cisco	XR-NCS4K-523K9	Cisco NCS 4000 IOS XR Software Release 5.2.3	2019-01-15	2019-04-16	2020-04-30
Cisco	XR-NCS4K-601K9	Cisco NCS 4000 IOS XR Software Release 6.0.1 USB key- RTU License	2018-01-15	2018-07-16	2023-07-31
Cisco	XR-NCS4K-612K9	Cisco NCS 4000 IOS XR Software Release 6.1.2 USB key- RTU License	2018-01-15	2018-07-16	2023-07-31
Cisco	XR-NCS4K-6142K9	Cisco USB Key delivery of XR 6.1.42 for NCS4K	2025-06-13	2026-06-13	2029-06-30
Cisco	XR-NCS4K-651K9	Cisco Delivery of XR 6.5.1 for NCS4K; grants RTU license	2025-06-13	2026-06-13	2029-06-30
Cisco	XR-NCS4K-6525K9	Cisco USB Key delivery of XR 6.5.25 for NCS4K; grants RTU license	2025-06-13	2026-06-13	2029-06-30