Dell, HPE & Cisco Part Number Lookup & Compatibility Guide
The fastest way to get an accurate quote — and avoid costly ordering mistakes — is to identify the exact part number and confirm it fits your platform. Dell, HPE and Cisco each label and number parts differently. This guide explains where to find part numbers, how to read them, and how to verify compatibility before you commit to a bulk order.
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Where to find a part number
Most enterprise parts carry their identifiers in several places: the physical label on the component, the service tag or serial sticker on the chassis, and the system's management interface. Always prefer the printed manufacturer part number over a generic description.
Dell & Dell EMC
Dell systems are identified by a Service Tag (and Express Service Code) on the chassis, which maps to the original factory configuration. Individual parts often show a Dell Part Number (DPN) printed as “P/N” on the label — commonly a seven-character alphanumeric, sometimes shown with revision and country-of-origin codes around it. Use the Service Tag to confirm the platform generation (for example, a PowerEdge R-series), then match memory, drives, PSUs and PERC controllers to that generation. Browse Dell & Dell EMC server parts.
HPE (ProLiant)
HPE typically lists multiple numbers on a part label. The two that matter most are the Spare Part Number (the one to order for replacements) and the Assembly/Option Part Number (the sales SKU of the original option kit). When sourcing, quote by the spare part number where possible, and confirm the ProLiant generation (for example, Gen10 vs Gen11) so memory and drive options match. Browse HPE ProLiant server parts.
Cisco
Cisco hardware uses a Product ID (PID) — the orderable model string — plus a serial number (SN) for the specific unit. Many parts also carry a VID (Version ID). Transceivers, line cards, power supplies and licenses must match the switch/router platform and software, so quote by PID and note the chassis it's going into. Browse Cisco networking & switch parts.
How to verify compatibility before ordering
- Match the platform generation — part numbers are tied to specific server/switch families.
- Match the interface and form factor — e.g. DDR4 vs DDR5, RDIMM vs LRDIMM, SAS vs SATA vs NVMe, drive size and tray.
- Note OEM vs compatible — see our OEM vs compatible guide.
- Send us the list — include part numbers, the target platform and quantities, and we'll validate fit and quote OEM or tested compatible options.
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Frequently Asked Questions
What if I only have the server's service tag or serial number?
That's often enough to start. Send the Dell Service Tag, HPE serial, or Cisco PID/SN and we'll help identify the matching parts.
HPE shows two part numbers — which do I order by?
Order by the spare part number where possible; the assembly/option number identifies the original kit. We can cross-reference either.
Can you cross a part to a compatible equivalent?
Yes. Give us the OEM part number and target platform, and we'll quote the genuine part and a tested compatible alternative where one exists.