---
title: "Motorola SURFboard SB6121 Cable Modem (SB6121)"
url: "https://omorp.com/product/motorola-surfboard-sb6121-cable-modem-sb6121-b004xc6gj0"
asin: "B004XC6GJ0"
brand: "ARRIS"
category: "pc-hardware"
price: "$99.99"
price_checked: "2026-08-03"
site: "Elan's Best (omorp.com)"
---

# Motorola SURFboard SB6121 Cable Modem (SB6121)

Motorola SURFboard SB6121 Cable Modem (SB6121)

The Motorola SURFboard SB6121 Cable Modem (SB6121) was $99.99 when we checked it on 2026-08-03. The median of the 7 prices we have recorded for it is $101.99.

## Overview

A new and improved version of the world's most widely deployed DOCSIS cable modems. For the residential cable subscriber who wants a powerful modem capable of delivering a high-speed data service at blazing fast speeds.10 / 100 / 1000 Base-T Ethernet Port (RJ-45) and 1-Year Limited Warranty. Additional information:• Requires CABLE Internet Service, if not sure your provider is CABLE call them to confirm • Compatible with ALL Major CABLE providers like Comcast, Cox, Charter, Time Warner, Mediacom, Bright House

## Editor's note

Worth checking your provider before buying, since it is not compatible with FiOS, U-verse, or Comcast Xfinity anymore. For a supported cable plan it is a proven workhorse.

## Specifications

- Connectivity Technology: Wired
- Compatible Devices: Personal Computer, Router, Laptop
- Item Dimensions L x W x H: 6.4"L x 2"W x 8.7"H
- Color: Black
- Brand: ARRIS
- Item Weight: 1.5 pounds
- Model Number: SB6121

## Price history (tracked by Elan's Best)

- Current: $99.99 (checked 2026-08-03)
- Lowest we have recorded: $99.99 on 2026-07-20
- Highest we have recorded: $104.99 on 2026-06-25
- Our own weekly checks: 7 over 39 days, from 2026-06-25 to 2026-08-03
- Median of our checks: $101.99

## Common questions

### Is the Motorola SURFboard SB6121 Cable Modem (SB6121) worth it?

Worth checking your provider before buying, since it is not compatible with FiOS, U-verse, or Comcast Xfinity anymore. For a supported cable plan it is a proven workhorse. Its Amazon listing shows 4.4 out of 5 stars across 11,640 ratings, which is the retailer's figure and not our verdict.

### How much does the Motorola SURFboard SB6121 Cable Modem (SB6121) cost?

The Motorola SURFboard SB6121 Cable Modem (SB6121) was $99.99 when we checked it on 2026-08-03. The median of the 7 prices we have recorded for it is $101.99. Prices change often, so the live retailer link carries the current number.

### Is now a good time to buy the Motorola SURFboard SB6121 Cable Modem (SB6121)?

At $99.99 the Motorola SURFboard SB6121 Cable Modem (SB6121) is back at the lowest price on our record, which we also recorded on 2026-07-20, across 7 weekly checks since 2026-06-25.

### What is the lowest price the Motorola SURFboard SB6121 Cable Modem (SB6121) has been?

The lowest price on our record for the Motorola SURFboard SB6121 Cable Modem (SB6121) is $99.99 on 2026-07-20, and the highest is $104.99 on 2026-06-25. That record is 7 weekly checks we took ourselves.

Retailer rating (from the Amazon listing, not our score): 4.4 out of 5 across 11,640 reviews.

---

Disclosure: Elan's Best may earn an affiliate commission on purchases made through our links, at no extra cost to the buyer. Commissions never change our picks.

Source: https://omorp.com/product/motorola-surfboard-sb6121-cable-modem-sb6121-b004xc6gj0