Cisco ISR 3900 Series — End-of-Life & EOSL Dates
The Cisco ISR 3900 Series is a router in Cisco's ISR product line. End-of-sale and end-of-service-life dates are listed by part number below, each linked to the Cisco EOL bulletin.
Is the Cisco ISR 3900 Series end of life?
Past end of serviceEvery tracked Cisco ISR 3900 Series SKU group is past Cisco end of service life (last group Dec 2022). Units in production should be treated as unsupported. For past-EOSL units, weigh third-party maintenance, spares, replacement, or a documented run-to-failure. Cisco’s named migration path: C1-CISCO4431.
Why this score
- Past end of service life — 44 months ago
- Vendor-published date, source-linked
- Vendor-named replacement / migration path available
- Category: router
The score reflects support-lifecycle timing and source confidence only — higher means more support runway. It is not a risk, safety or compliance rating. How it’s calculated →
Switch hardware
EOSL — PAST25 SKUs in this group
Options from here
Unsupported nowThe Cisco ISR 3900 Series is past Cisco end of service life. These are the paths teams take from here:
Keep it in production past the OEM cutoff with an independent maintainer.
Buy spares now, while units still circulate on the secondary market.
It is unsupported today — set a migration timeline and budget.
Low-criticality role — document the risk, harden backups, retire on your terms.
Independent and informational — EOSL.ai sells no hardware or maintenance and lists no paid placements. Third-party maintenance keeps unsupported gear in production past the OEM cutoff; whether it fits depends on the asset's role.
ISR 3900 Series — questions
Is the Cisco ISR 3900 Series end of life?
Yes — every tracked 3900 Series SKU group is past its last date of support.
What is the last date of support for the 3900 Series?
Dec 2022 — per the Cisco EOL bulletin.
Where do these 3900 Series dates come from?
Every end-of-sale and end-of-service-life date on this page links to the official Cisco EOL bulletin it was taken from.
What is the replacement for the 3900 Series?
Cisco's end-of-life bulletin lists C1-CISCO4431 as the recommended migration path for the 3900 Series. Exact per-part-number replacements are in the linked bulletin.
More Cisco ISR
On the same timetable
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