📡
Frequency
821 MHz
Frequency
821 MHz
🧭
Range
806–826 MHz
Range
806–826 MHz
🧩
Band Group
UHF (300–1000 MHz)
Band Group
UHF (300–1000 MHz)
🌐 Summary
The 821 MHz allocation is part of the UHF (300–1000 MHz) spectrum. This range is used worldwide for critical applications that keep our communications and infrastructure running smoothly. On this page we highlight how each band is applied in real systems, from regulatory assignments to everyday devices. Our goal is to make spectrum data clear and practical for engineers, regulators, and enthusiasts alike.
Key uses of this band include: 821 MHz: Public safety & SMR uplinks (806–824); cellular 850/CLR uplink starts at 824 MHz; Mobile, Fixed; Narrowband/Trunked LMR uplinks; Smartphones, LTE/5G base stations, CPEs.
800 MHz public safety/SMR mobile transmit segment (≈806–824 MHz); paired with 851–869 MHz base stations; legacy rebanding from Nextel era.
🔍 Explore the full RF Spectrum database
📡 Band & Geometry key
| Field | Value |
|---|---|
| Wavelength (m) | 0.365 |
| Waveforms | Analog/digital PMR, CDMA, LTE, 5G NR |
| Antenna Form Factor (Typical) | ¼-wave ≈ 9.14 cm |
| Band Family | IMT/Cellular |
| Band | 800 MHz Public Safety / SMR (UL) + start of Cellular UL |
| Primary Common Name | Public Safety / SMR uplink |
| FSPL @ 1 km [dB] | 90.726863142389 |
| FSPL @ 10 km [dB] | 110.72686314239 |
| Fresnel Radius @ 1 km (m) | 9.5575441629275 |
| Band Group | UHF (300–1000 MHz) |
| Tax Band Family | UHF |
| Tax Band Class | 800/850 MHz Cellular & SMR (806–896) Band |
🧩 Applications & Usage
| Field | Value |
|---|---|
| Primary Application | Public safety & SMR uplinks (806–824); cellular 850/CLR uplink starts at 824 MHz |
| Lower Neighbor Use | 700/800 MHz Mobile (IMT) + Public Safety |
| Upper Neighbor Use | Cellular 850 (CLR) — Uplink (segment) |
| Typical Services Devices | Narrowband/Trunked LMR uplinks |
| Market Common Devices | Smartphones, LTE/5G base stations, CPEs |
| Refarming Use | No |
| Device Ecosystem Size | High (>1000 models) |
| Device Hotspots (MHz) | 835, 845, 880 |
| Device Category | Cellular Handsets / Modems (legacy) |
| Typical Use Cases | – |
| Modulation (Device) | GSM (200 kHz), CDMA/AMPS (legacy) |
| Channel Width (Device) [kHz] | 200 |
| Device Region Profiles | Cellular 850 legacy in many countries |
| Per-Region EIRP Or Duty (Device) | Network- and band-class specific; handhelds ~23 dBm |
| Allocation Relevance (Device) | Medium (legacy cellular) |
| Adjacent-Band Collision Risks (Device) | Moderate: cellular band edges |
| Example Devices Or Skus | Cellular (2G/3G Legacy Devices) |
| Common Protocols | LTE; 5G NR; GSM/EDGE; UMTS (legacy); Analog FM (12.5 kHz); DMR; P25 (region); TETRA (region) |
🗒️ Notes
| Field | Value |
|---|---|
| Receiver Selectivity Notes | – |
| Interference Notes | Adjacent to cellular bands; interop issues |
| Compatibility Risk Notes | – |
| Notes | 800 MHz public safety/SMR mobile transmit segment (≈806–824 MHz); paired with 851–869 MHz base stations; legacy rebanding from Nextel era. |
| Propagation Notes | Strong coverage, good indoor penetration |
⚙️ Technical Rules
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 806 |
| Upper Band Frequency Limit | 826 |
| EIRP Indoor Limits | LMR/SMR mobiles 1–25 W |
| EIRP Outdoor Limits | LMR mobiles 1–50 W |
| PSD Limit | — |
| Emission Mask Class | LMR/SMR 12.5 kHz |
| Guardband Minimum [kHz] | 12.5 |
| Typical Bandwidths | 5, 10, 20 MHz |
| Autocalculated Bandlimits | No |
| Typical Bandwidths (Estimated) | 5, 10, 20 MHz |
| Max EIRP [dBm] | Network- and band-class specific; handhelds ~23 dBm |
| Power Source Or Duty Profile (Typical) | – |
| Channelization Plan | 5, 10, 20 MHz |
| Channelization | 25 kHz (legacy); 1.25 MHz (CDMA); 5 MHz (LTE/NR) |
| Guard Band Requirement | – |
| OOB Emission Limit [dBm/MHz] | -13 (baseline) |
| Spurious Emission Limit (dBm) | -30 (baseline) |
| RX Blocking Min [dBm] | -15 (planning) |
| Duplexing | FDD |
| Duplexing Information | FDD: 806–824 MHz (PS/SMR UL) uplink / 851–869 MHz (PS/SMR DL) downlink |
| Uplink Pairing | 806–824 MHz (PS/SMR UL) |
| Downlink Pairing | 851–869 MHz (PS/SMR DL) |
| Paired Band Info | Band 20 (EU 800): 832.0-862.0 MHz ↔ 791.0-821.0 MHz |
| Max EIRP [dBm] | UE: 23 dBm, BS: up to 64 dBm |
| Channelization Block Size | – |
| 3GPP Band Number | |
| Example 3GPP Bands | Band 20 (n20) DL (EU) |
| LTE Uplink Bands | Band 26 |
| LTE Downlink Bands | Band 20 |
| NR Uplink Bands | n26 |
| NR Downlink Bands | n20 |
| Guard Bands | – |
| Protocol Or Standard | – |
🌎 Country Overrides
| Field | Value |
|---|---|
| Tax Service Category | Other / Various |
| Tax License Type | Licensed / Service-Specific |
| Tax Regions | Global / Varies |
| ITU Region 1 (Europe, Africa, Middle East (west of Persian Gulf), Western Russia & Mongolia) | Mobile, Fixed |
| ITU Region 2 (North America, South America, Central America, Caribbean, Greenland, Eastern Pacific Islands (Americas region)) | Mobile, Fixed |
| ITU Region 3 (Asia, Australia, Pacific Islands, Oceania, Indian Subcontinent, East Asia & Southeast Asia) | Mobile, Fixed |
| License Type | Licensed public safety/SMR; Licensed cellular (from 824 MHz) |
| Primary Application | Public safety & SMR uplinks (806–824); cellular 850/CLR uplink starts at 824 MHz |
| Primary Services | Mobile, Fixed |
| Spurious Emission [dBm] | -30 (baseline) |
| Lower Neighbor Use | 700/800 MHz Mobile (IMT) + Public Safety |
| Upper Neighbor Use | Cellular 850 (CLR) — Uplink (segment) |
| Licensing Model | Licensed (Public safety / LMR) |
| Typical Services Devices | Narrowband/Trunked LMR uplinks |
| US FCC Alloc | Public Safety / LMR (Uplink)– |
| CA IC Alloc | Public Safety / LMR (Uplink)– |
| UK Ofcom Alloc | LMR (regional)– |
| US Ref | 47 CFR Part 90 (Private Land Mobile) |
| Typical Bandwidths | 5, 10, 20 MHz |
| Market Licensing Model | Exclusive Licensed |
| Market Common Devices | Smartphones, LTE/5G base stations, CPEs |
| Fresnel Radius (1st, 1 km) [m] | 9.5575441629275 |
| Typical Bandwidths (Estimated) | 5, 10, 20 MHz |
| Auction Status | Auctioned |
| Refarming Use | No |
| Typical Site Spacing km | 2 / 8 |
| Device Ecosystem Size | High (>1000 models) |
| Traffic Load Share | Coverage-heavy, low capacity share |
| Device Hotspots (MHz) | 835, 845, 880 |
| Device Category | Cellular Handsets / Modems (legacy) |
| Typical Use Cases | – |
| Typical Center Frequencies [MHz] | – |
| Rule Part (Fcc Or Region) | – |
| Modulation (Device) | GSM (200 kHz), CDMA/AMPS (legacy) |
| Channel Width (Device) [kHz] | 200 |
| Device Region Profiles | Cellular 850 legacy in many countries |
| Per-Region EIRP Or Duty (Device) | Network- and band-class specific; handhelds ~23 dBm |
| Allocation Relevance (Device) | Medium (legacy cellular) |
| Adjacent-Band Collision Risks (Device) | Moderate: cellular band edges |
| Example Devices Or Skus | Cellular (2G/3G Legacy Devices) |
| Antenna Form Factor (Typical) | ¼-wave ≈ 9.14 cm |
| Power Source Or Duty Profile (Typical) | – |
🛡️ Regulatory & Neighbors
| Field | Value |
|---|---|
| Lower Band Frequency Limit | 806 |
| Upper Band Frequency Limit | 826 |
| Rx Blocking Min dBm | -15 (planning) |
| Lower Neighbor Use | 700/800 MHz Mobile (IMT) + Public Safety |
| Upper Neighbor Use | Cellular 850 (CLR) — Uplink (segment) |
| Lower Neighbor Band | 700/800 MHz Mobile (IMT) + Public Safety |
| Lower Neighbor Range | 699.000–806.000 MHz |
| Upper Neighbor Label | Cellular 850 (CLR) — Uplink (segment) |
| Upper Neighbor Range | 827.000–849.000 MHz |
| Adjacent-Band Collision Risks (Device) | Moderate: cellular band edges |
| Real-World Range (Indoor/Outdoor) | – |
| US FCC Alloc | Public Safety / LMR (Uplink)Public Safety / LMR (Uplink) |
| CA IC Alloc | Public Safety / LMR (Uplink)Public Safety / LMR (Uplink) |
| UK Ofcom Alloc | LMR (regional)LMR (regional) |
| Regulatory References | US: 47 CFR Part 90 (Private Land Mobile); CA: ISED RSS‑119 (Land Mobile 27.41–960 MHz); UK: Ofcom PMR/Business Radio (UK FAT) |
| Global Harmonization | Global |
| Crossborder Coordination | High |
| Sharing Mechanism | Exclusive licensed |
| Auction Status | Auctioned |
| Guard Or Pair | – |
📈 Market & Measurements
| Field | Value |
|---|---|
| Noise Floor | -110 dBm (est.) |
| Interference Cases | – |
| Lower Neighbor Range | 699.000–806.000 MHz |
| Upper Neighbor Range | 827.000–849.000 MHz |
| Interference Notes | Adjacent to cellular bands; interop issues |
| Market Licensing Model | Exclusive Licensed |
| Market Commercial Value | High |
| Market Common Devices | Smartphones, LTE/5G base stations, CPEs |
| Market Deployment Density | High |
| Noise Floor (Estimated) | -110 dBm (est.) |
| Market Commercial Value (Estimated) | High |
| Ecosystem Maturity | Mature |
| Indoor Penetration | Good |
| Known Interference | Broadcast to IMT coexistence issues |
| Device Ecosystem Size | High (>1000 models) |
| Real-World Range (Indoor/Outdoor) | – |
| Antenna Form Factor (Typical) | ¼-wave ≈ 9.14 cm |
| Ecosystem Maturity | Mature |
| Device Ecosystem Size | High (>1000 models) |
| Chipset Availability | Qualcomm, MediaTek, HiSilicon |
| Operator Deployments | Global Tier-1 operators |
| Technology Generations Deployed | LMR / TETRA digital voice |
| Roaming Support | Yes |
| Traffic Load Share | Coverage-heavy, low capacity share |
| Indoor Penetration | Good |
| Known Interference | Broadcast to IMT coexistence issues |
| Occupancy | Medium |
| Occupancy Bucket Pct | 10–30% |
| Latency Profile | – |
| Common Channels Or Profiles | – |
| Security Features | – |
| Lbt Or Fhss Requirement | – |
| Popularity (Installed Base) | – |
| Coexistence Tips | – |
| Latency Class | – |
| Device Hotspots (Scoped && Tagged) | – |
