Arris (S33-RB) - Cable Modem - DOCSIS 3.1 Multi-Gigabit Cable Modem for Comcast Xfinity, Cox, Spectrum & More 1 & 2.5 Gbps Ports 2.5 Gbps Max Internet Speeds 4 OFDM Channels 1 Year Warranty - Renewed
Condition: Refurbished - Excellent
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Tuesday, Sep 22
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Features
- Approved for Cox, Spectrum and Xfinity internet along with other US cable internet providers. Is NOT compatible with ATT, CenturyLink, Verizon, Frontier or other Fiber Optic, DSL or Satellite internet service providers.
- Does NOT include Wi-Fi and Does NOT support cable digital voice service.
- Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees (Savings vary by cable service provider). Certified for use with most U.S. cable internet service providers. For a complete list see additional details below.
- Modem Technology: DOCSIS 3.1 is the newest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0, provides better security, reduces lag while gaming & enables multi-gig networking (ability to run fast speeds on your copper cable from your internet provider).
- Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the modem. Connect to a Wi-Fi router for networking.
- Approved for Cox, Spectrum and Xfinity internet along with other US cable internet providers. Is NOT compatible with ATT, CenturyLink, Verizon, Frontier or other Fiber Optic, DSL or Satellite internet service providers.
- Does NOT include Wi-Fi and Does NOT support cable digital voice service.
Description
Your multi-Gigabit home network will be ready with the SURFboard S33. A DOCSIS 3.1 cable modem. With a 2.5 Gbps Ethernet port plus an additional 1 Gbps Ethernet port it's capable of combined download speeds up to 3.5 Gbps. The S33 is the fastest modem in the SURFboard lineup delivering the fastest speeds and the latest technology without the premium rental cost.
Brand: ARRIS
Internet service provider: Charter, Comcast Xfinity, Cox, Most Regional Cable Internet Providers, NOT compatible with ATT, Verizon, Centurylink, Google Fiber, Suddenlink See more
Connectivity Technology: Ethernet
Compatible Devices: Personal Computer
Color: White
Brand: ARRIS
Internet Service Provider: Charter, Comcast Xfinity, Cox, Most Regional Cable Internet Providers, NOT compatible with ATT, Verizon, Centurylink, Google Fiber, Suddenlink
Modem Type: Cable
UPC: 612572216828
Unit Count: 1 Count
Manufacturer: CommScope
Number of Items: 1
Built-In Media: ARRIS Surfboard S33-RB DOCSIS 3.1 2.5Gbps Cable Modem - Xfinity, Spectrum, Cox & More (RENEWED)
Item Type Name: Docsis 3.1 Modem
Model Number: S33
Mfr Part Number: S33-RB
Warranty Description: 1 Year Limited Warranty
Connectivity Technology: Ethernet
Compatible Devices: Personal Computer
Number of Ports: 2
Maximum Downstream Data Transfer Rate: 2500 megabits_per_second
Maximum Upstream Data Transfer Rate: 2500 megabits_per_second
Data Transfer Rate: 2500 megabits_per_second
Number of Ethernet Ports: 2
Color: White
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Sep 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
⭐⭐⭐⭐⭐ **Excellent Modem for High-Speed Internet!** The ARRIS Surfboard S33 (Renewed) is a fantastic modem that works great with my local ISP, Rainier Connect. Setting it up was a breeze, and it has delivered outstanding performance since day one. With DOCSIS 3.1 technology and multi-gigabit capability, I am getting lightning-fast speeds, perfect for streaming, gaming, and working from home. The 1 and 2.5 Gbps ports are a significant upgrade, allowing me to maximize my internet plan's potential. The modem supports up to 2.5 Gbps max speeds and utilizes 4 OFDM channels to ensure a stable and reliable connection. I am thoroughly impressed with this renewed model—it performs like new and offers excellent value. If you're looking for a high-performance cable modem, I highly recommend the ARRIS Surfboard S33. It has been a game-changer for my internet experience with Rainier Connect.
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Reviewed in the United States on June 4, 2024 by Aaron
No issues, great connection, have not had a need to restart the modem since purchasing except for when Xfinity was working on lines.
Reviewed in the United States on January 3, 2025 by NJAlex
For a point of reference, I'm a network engineer. This is easy to set up, if it works for your specific application. The problem with it is, there is no way to easily configure things such as the internal DHCP server or certain security features you'd have access to with an older modem. If your firewall on your network will not receive a DHCP address correctly from this device, you have little options for resolving the issue. I wiresharked the connection and my firewall was failing to negotiate an IP lease from the modem. With no way to access any meaningful interface other than the web interface on the modem (which is useless since it only shows information and does not allow any configurations to be edited) or using the completely worthless Arris android app, which is just informational and does nothing to configure the device, you're screwed. I've had the device randomly fail several times. Each time the DHCP server in the device failed to hand out an IP address to my firewall. One time, the cable company pushed out a firmware upgrade which broke it. The firmware upgrades have also removed my passwords and reset them to the default. Bring back user editable configurations and my rating would go up. But this canned one size fits all unconfigurable crap is a pain in the butt.
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Reviewed in the United States on September 15, 2023 by David W Potts
I recently upgraded my 600Mbps Blast Speed Internet with Gigabit speed. However, my existing SURFBoard 6191 was incompatible with my new plan. I did my research and found this S33 model was on Xfinity's recommended list for Gigabit speed and sure enough, it works as advertised.
Reviewed in the United States on December 17, 2024 by C Dizzle
While my ISP contract is for 300 mbps I have always gotten up to 375 even 380 on occasion while using an Arris 6190 DOCSIS 3.0 for many years now. This hasn't changed with the DOCIS 3.1 and I wasn't really expecting it to since that would be an expectation too far. But when testing my speeds at different times throughout the day, with the 3.1 I get more consistent max to near max speeds. Setting this modem up would have been a breeze if Spectrum's set up page actually worked when upgrading a modem vs installing a first time new one. I was hoping with fingers crossed that I could get 'er done in 15 mins max and not have to call for assistance. Not to be. Trying to use their chat was a waste of time as well. Whoever was on the other end was lost from the get go and abandoned me in no time flat. So after finally telling their robo recorded menu I wanted a human (customer support) which wasn't a choice on their menu, I broke through to someone who had a clue. So the 15 mins I was hoping for turned into the better part of an hour and a half for a simple setup. One thing: the BRIGHT blue light that so many reviewers seem to be complaining about here, isn't that BRIGHT on my modem. In fact it isn't BRIGHT at all. It is just a blue smiley face light at the very bottom of this very tiny modem, and even looking at it in a completely darkened room it isn't BRIGHT. So I'm left to just Laugh Out Loud. ;-) Lastly, this modem to the touch feels a tad warmer than the 3.0 but their is ample ventilation at it's top, where it should be, so that should not be a problem. Also, I have as yet been unable to access the modem's settings page. 192.168.100.1. I get nothing. Not really a big deal since my experience with that page for the 3.0 was that it gave the status of the modem. That's about it. No real settings to speak of. If it's status ever becomes 'not working' I'm sure I'll know that without needing to go the modem's web page.
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Reviewed in the United States on May 22, 2023 by Doplar Doplar
I have nothing to complaint about the modem itself. It is a factory refurbished model and looks like new. Installation on Xfinity was smooth, just had to remove my old Motorola plug the coaxial and Ethernet cable to the S33, plug it to the wall outlet, open the Xfinity app and add the new modem. It worked on the first try. I have the 1.2gb/s plan so I’m supposed to get 1.2gb/s download and 120mb/s upload. As I’m limited to my router’s 1gb/s port I’m not expecting to get 1.2gb/s download but the 120mb/s download would be very welcome. As you guys can see in my second picture I’m getting about 977mb/s download and 948mb/s upload internally using a gigabit LAN connection. The third picture shows a internet test and there is where the problem using the S33 with Xfinity is, can’t get 120mb/s upload because Comcast blocks this modem from using mid-split with their network because they say it has not been certified so if you want that fast upload speed you will have two options, renting their modem or buying a Hitron CODA. I’m giving the product 5 stars because it’s pretty good and the issue with Xfinity is not the product’s fault so if you don’t rely on high upload speeds using Xfinity go for it, it’s certified by Xfinity for up to 2.33gb/s download but if you need high upload speeds look elsewhere.
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Reviewed in the United States on January 9, 2024 by Amazon Customer Amazon Customer
was initially afraid of getting a renewed unit, but it's been months with no issue at all. i'm used to needing a network reset, but i've been pleasantly surprised.
Reviewed in the United States on January 6, 2025 by emar903