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Cisco ISR4000 Lifecycle Models

Browse 6 Cisco ISR4000 model lifecycle records. Open a part number to compare recorded EOL / EOS / EOSL dates, source details, replacement notes, and sourcing options.

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Series summary

Cisco ISR4000 model coverage

Brand: Cisco Category: Software Series: Cisco ISR4000
Total models
6
Dated models
6
EOSL range
2024-10-31 to 2025-10-31
Sourcing links
6

Model lifecycle table

Showing 1-6 of 6 models.

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ISR4221-B-K9

Cisco ISR4000 ISR4221-B/K9

EOSL
EOL
2019-04-30
EOS
2019-10-29
EOSL
2024-10-31
ISR4321-B-K9

Cisco ISR4000 ISR4321-B/K9

EOSL
EOL
2019-04-30
EOS
2019-10-29
EOSL
2024-10-31
ISR4331-B-K9

Cisco ISR4000 ISR4331-B/K9

EOSL
EOL
2019-04-30
EOS
2019-10-29
EOSL
2024-10-31
SISR4451XNPEK9-38S

Cisco ISR4000 SISR4451XNPEK9-38S

EOSL
EOL
2020-04-30
EOS
2020-10-29
EOSL
2025-10-31
SISR4451XUK9-38S

Cisco ISR4000 SISR4451XUK9-38S

EOSL
EOL
2020-04-30
EOS
2020-10-29
EOSL
2025-10-31
SISR4451XUK9-39S

Cisco ISR4000 SISR4451XUK9-39S

EOSL
EOL
2020-04-30
EOS
2020-10-29
EOSL
2025-10-31
Sourcing path

Availability and replacement options

Use these links to review current product pages, exact SKU matches, replacement checks, and quote requests.

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Product and replacement links

Linked SKU and product paths

No exact SKU or replacement page is available yet. Use the category path to review current products.