The ARRIS Touchstone DG3450 is the same DOCSIS 3.1 gateway that Spectrum and a long list of regional cable providers hand out as rental equipment. Buying one renewed means the monthly equipment fee goes away and nothing about your service changes. It combines a gigabit-capable cable modem, dual-band WiFi, four Gigabit Ethernet ports, and MoCA 2.0 in one box, and every unit we ship is tested in the US and covered by a 90-day warranty.
Over 500 in stock, ships today
ARRIS DG3450 DOCSIS 3.1 Modem Router Combo
Renewed from $64.79 (Open Box $74.97)
Tested and ready to activate on Spectrum and most regional cable providers. 90-day warranty and 30-day returns.
Shop the DG3450Key Takeaways
- The DG3450 is a two-in-one gateway: a DOCSIS 3.1 cable modem and a dual-band WiFi 5 router in one box, so no separate router is required.
- It is approved for Spectrum and deployed by regional cable providers including Cox, Mediacom, Midco, Sparklight, WOW, Astound, and Breezeline. It is not listed for Xfinity and does not work on fiber or DSL.
- A renewed DG3450 pays for itself in about five to six months against a typical $10 to $15 monthly gateway rental fee.
Who the ARRIS DG3450 Is For
The DG3450 is the right buy if you are on Spectrum or one of the regional cable providers below, you are paying a monthly fee for the gateway your provider gave you, and you want one box that handles both the internet connection and the WiFi. It is built for plans up to 1 Gbps, which covers nearly every cable tier sold today.
It is the wrong buy in three situations. If your provider is Xfinity, the DG3450 is not on Xfinity's list, and our Xfinity-compatible modems collection has the models that are. If you have fiber or DSL service (Verizon Fios, AT&T Fiber, Google Fiber, CenturyLink, Frontier), no cable modem will work, including this one. And if you want WiFi 6 or WiFi 7 speeds on the wireless side, the DG3450's WiFi 5 radio is the older standard. You can still use it as the modem and run a newer router behind it in bridge mode, which is a setup many gigabit households prefer anyway.
What a Renewed DG3450 Costs and What You Get
We sell the DG3450 in two conditions. Refurbished units are $64.79 and have been inspected, tested on live cable infrastructure, cleaned, and reset to factory defaults. Open Box units are $74.97 and are unused units with opened packaging. Both come with the power adapter and an Ethernet cable, ship from US warehouses, and carry the same 90-day warranty and 30-day returns. Orders over $49 ship free, so the DG3450 qualifies on its own.
Against a rental fee, the math is simple. At $10 a month the refurbished unit breaks even in seven months; at $15 a month it breaks even in five. Everything after that is money you keep, and the DG3450 is a gateway that providers have kept in service for years, so the savings run long. If your current gateway is already showing its age, our guide on how long modems last covers the signs it is time to replace it.
Is the ARRIS DG3450 a Modem or a Router?
It is both. The DG3450 is a gateway, meaning the cable modem and the WiFi router share one enclosure, one power outlet, and one setup process. The modem side handles DOCSIS 3.1 and 3.0 cable service. The router side broadcasts dual-band WiFi and feeds four wired Gigabit ports. If you already own a router or mesh system you prefer, enable bridge mode and let your own equipment handle the WiFi. You may also see the model listed as DG3450A; that is a regional label and the hardware and features are the same.
ISP Compatibility
The DG3450 is a cable-only device. Activation is the same as any customer-owned modem: connect the coax, power on, and register the MAC address online or with a quick call. Our DG3450 setup and activation guide walks through every provider's activation steps, the admin login, bridge mode, and the light codes.
| Provider | Compatibility | Notes |
|---|---|---|
| Spectrum | Yes, approved | Self-activate at spectrum.net/selfinstall or call support |
| Cox | Yes | Activate at cox.com/activate; may require serial number registration |
| Mediacom | Yes | Works on DOCSIS 3.0 and 3.1 plans |
| Midco, Sparklight, WOW | Yes | Provider-deployed model; activate by phone or self-install portal |
| Astound (RCN), Breezeline, TDS | Yes | Confirm the model is on your plan's approved list before activating |
| Xfinity (Comcast) | Not listed | See Xfinity-compatible modems |
| Fiber and DSL (Fios, AT&T, CenturyLink) | No | Cable modems do not work on fiber or DSL lines |
See the renewed DG3450 and current stock
ARRIS DG3450 Specs
| DOCSIS standard | DOCSIS 3.1, backward compatible with 3.0 |
| Channels | 2x2 OFDM/OFDMA (3.1) plus 32x8 bonded (3.0) |
| Best for plans | Up to 1 Gbps cable internet |
| WiFi | Dual-band 802.11ac Wave 2 (WiFi 5), 4x4 on 5 GHz, 3x3 on 2.4 GHz |
| Ethernet | 4 x Gigabit LAN |
| MoCA | MoCA 2.0 (adapters sold separately) |
| Security | WPA2, SPI firewall, NAT, parental controls |
| Admin address | 192.168.0.1 |
| Manufacturer | ARRIS (CommScope) |
DG3450 vs SBG8300
These two come up together because they are close cousins. The DG3450 is the Touchstone line, which ARRIS builds for cable providers to deploy, and it includes MoCA 2.0. The SBG8300 is the retail SURFboard line, sold in stores, with a slightly faster AC2350 WiFi radio and no MoCA. The deciding factor is your provider: the SBG8300 is on Xfinity's list and the DG3450 is not, while on Spectrum and the regional providers above the DG3450 is the approved model and typically costs less renewed. If you are on Spectrum, buy the DG3450. If you are on Xfinity, start with the Xfinity collection.
Gateway or Separate Modem and Router?
A gateway like the DG3450 gives most households the simplest path online: one device, one setup, and dual-band coverage that handles plans up to 1 Gbps. A separate modem and router cost more up front but let you upgrade the WiFi side on its own later. The DG3450 works either way. Use its built-in WiFi on day one, and if you later want WiFi 6 or mesh coverage, switch it to bridge mode and plug the new router into a LAN port. For standalone modems, our DOCSIS 3.1 modems collection has the current options.
Why Buy Renewed from ModemGuides
Every DG3450 we ship is inspected, tested on live cable infrastructure, and cleaned before it goes out. You get a 90-day full-coverage warranty, 30-day returns, and our activation guarantee: if a supported modem will not activate on your plan, we make it right. Orders ship from US warehouses and usually arrive in one to three business days, and our support team is US-based and answers Monday through Friday. Buying ten or more? Bulk pricing of 10% off applies automatically at checkout.
Prefer to Order on Amazon?
The same renewed DG3450 is listed on Amazon if you would rather use the checkout you already know. View the DG3450 on Amazon.
Frequently Asked Questions
Is the ARRIS DG3450 a modem or a router?
Both. It is a gateway that combines a DOCSIS 3.1 cable modem with a dual-band WiFi router, so a single device handles your entire connection.
Is the DG3450 compatible with Spectrum?
Yes. Spectrum deploys the DG3450 as one of its own gateways, so a customer-owned unit activates through the standard self-install process at spectrum.net/selfinstall.
Is the DG3450 compatible with Xfinity?
No. The DG3450 is not on Xfinity's approved device list. Xfinity customers should choose from our Xfinity-compatible modems.
What is the difference between the DG3450 and the DG3450A?
Nothing that affects how it works. The A suffix is a regional label that appears on some provider-issued units. Specs, ports, WiFi, and activation are the same.
How fast is the ARRIS DG3450?
The DG3450 is rated for cable plans up to 1 Gbps. Wired devices on its Gigabit Ethernet ports get full plan speed; WiFi speed depends on distance, walls, and the device you are connecting.
How do I log in to the DG3450 or reset it?
Go to 192.168.0.1 in a browser and use the credentials printed on the bottom label. To factory reset, hold the recessed reset button on the back for about 15 seconds. Our setup and activation guide covers the admin panel, WiFi password changes, bridge mode, and every light code in detail.
Does the DG3450 support WiFi 6?
No. It uses WiFi 5 (802.11ac Wave 2). If you want WiFi 6 or WiFi 7, run the DG3450 in bridge mode with a newer router or mesh system behind it.
Is a renewed DG3450 a good idea?
Yes, for the same reason providers keep them in service for years: it is a durable, widely deployed gateway. Ours are tested on live cable infrastructure, covered by a 90-day warranty and 30-day returns, and cost a fraction of a year of rental fees.
Over 500 in stock, ships from the US
ARRIS DG3450, renewed and tested
From $64.79 (free shipping over $49)
Approved for Spectrum. 90-day warranty, 30-day returns, US-based support.
Shop the DG3450
