Cell Site Map

eNB / gNB ID calculator

Convert an LTE, 5G NR or UMTS cell ID to its eNB/gNB and sector, or the other way around.

eNB ID106,770
Sector / cell ID1

The formula

A cell identity packs a node ID (eNB, gNB, or RNC-eNB) and a local sector/cell number into one integer. This site's own import pipeline (README §3) uses the same bit split to cluster raw cells into physical sites:

  • LTE: eNB = CellID ≫ 8, sector = CellID mod 256 (28-bit ECI, low 8 bits are the cell).
  • 5G NR: gNB = CellID ≫ 12, cell = CellID mod 4096 (36-bit NCI, low 12 bits are the cell).
  • UMTS: RNC-eNB = CellID ≫ 16, cell = CellID mod 65536.

Worked example: LTE Cell ID 27333121 → eNB 106770, sector 1 (since 27333121 = 106770 × 256 + 1).