{"product_id":"greenwave-c4000lz","title":"GreenWave C4000LZ WiFi 6 Modem Router | CenturyLink, Brightspeed","description":"\u003cdiv class=\"mg-product-desc\"\u003e\n\n\u003cdiv class=\"mg-bulk-callout\"\u003e\n\u003cp\u003e\u003cstrong\u003eBulk Discount:\u003c\/strong\u003e Buy 10, get 10% off, applied automatically at checkout. \u003ca href=\"https:\/\/www.modemguides.com\/collections\/bulk-sale-buy-10-get-10-off\"\u003eBrowse bulk deals\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cp\u003eThe renewed \u003cstrong\u003eGreenWave C4000LZ\u003c\/strong\u003e is a WiFi 6 modem router built for CenturyLink and Brightspeed internet. It is the highest-throughput CenturyLink gateway we carry, with download speeds up to 2.5 Gbps, five Gigabit Ethernet ports, and a dedicated WAN port that lets it run as a standalone router on fiber. One device replaces your rented gateway and your router, ending the monthly equipment fee. Every unit is professionally tested and backed by our 90-day full coverage warranty.\u003c\/p\u003e\n\n\u003ch2\u003eKey Takeaways\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiFi 6 (802.11ax) gateway\u003c\/strong\u003e with dual-band coverage, Smart Connect band steering, and backward compatibility with older WiFi devices (a\/b\/g\/n\/ac).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeeds up to 2.5 Gbps download and 1 Gbps upload\u003c\/strong\u003e, with five Gigabit Ethernet ports (1 WAN + 4 LAN) for wired stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWorks with CenturyLink DSL and fiber\u003c\/strong\u003e and is used on Brightspeed service in former CenturyLink territories (confirm with your provider before ordering).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReplaces rented gateway equipment\u003c\/strong\u003e, typically saving $180 per year, with a 90-day full coverage warranty and USA-based support.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIs the GreenWave C4000LZ Compatible with My Internet Provider?\u003c\/h2\u003e\n\u003cp\u003eThe C4000LZ is built for \u003cstrong\u003eCenturyLink\u003c\/strong\u003e DSL and fiber-optic internet. It is also used on \u003cstrong\u003eBrightspeed\u003c\/strong\u003e service in the former CenturyLink territories Brightspeed now operates. Its dedicated Gigabit WAN port lets it act as a standalone router on fiber deployments, while the DSL side covers standard copper plans. Confirm the C4000LZ is approved for your specific plan and address before ordering, since deployment types vary. For setup help, see our \u003ca href=\"https:\/\/www.modemguides.com\/blogs\/modemguides-blog\"\u003eCenturyLink activation guide\u003c\/a\u003e or \u003ca href=\"https:\/\/www.modemguides.com\/blogs\/modemguides-blog\"\u003eBrightspeed activation guide\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eThe C4000LZ does \u003cstrong\u003enot\u003c\/strong\u003e work with cable internet (Xfinity, Spectrum, Cox), Verizon Fios, AT\u0026amp;T service, satellite, or 5G home internet.\u003c\/p\u003e\n\n\u003ch2\u003eWhich CenturyLink Gateway Should You Buy?\u003c\/h2\u003e\n\u003cp\u003eWe carry four CenturyLink-compatible gateways, and each fits a different situation. The \u003cstrong\u003eC4000LZ\u003c\/strong\u003e is the performance pick, with WiFi 6 and the highest speed ceiling of the group, making it the best match for fiber and top-tier plans. The \u003ca href=\"https:\/\/www.modemguides.com\/products\/greenwave-c4000lg-centurylink-wifi-6-single-line-xdsl-modem-router\"\u003eGreenWave C4000LG\u003c\/a\u003e is its WiFi 6 sibling for standard single-line DSL plans up to 1 Gbps. The \u003ca href=\"https:\/\/www.modemguides.com\/products\/actiontec-c3000a\"\u003eActiontec C3000A\u003c\/a\u003e covers bonded (two-line) VDSL2 and G.fast plans. The \u003ca href=\"https:\/\/www.modemguides.com\/products\/technicolor-c2100t\"\u003eTechnicolor C2100T\u003c\/a\u003e is the budget pick and the only one with VoIP phone ports for CenturyLink home phone service. Not sure which line type you have? Your provider can tell you in one quick call.\u003c\/p\u003e\n\n\u003ch2\u003eWiFi 6 Performance\u003c\/h2\u003e\n\u003cp\u003eBuilt on the WiFi 6 (802.11ax) standard, the C4000LZ handles many high-bandwidth devices at once, keeping 4K streaming, gaming, and video calls smooth in busy households. Dual-band 2.4 GHz and 5 GHz radios provide strong signals and wide coverage, and backward compatibility means older WiFi devices connect without issue. \u003cstrong\u003eSmart Connect\u003c\/strong\u003e automatically assigns each device to the best band under a single unified network name, while \u003cstrong\u003eDynamic QoS\u003c\/strong\u003e prioritizes streaming, gaming, and call traffic to reduce lag and buffering.\u003c\/p\u003e\n\n\u003ch2\u003eWired Connectivity\u003c\/h2\u003e\n\u003cp\u003eFive Gigabit Ethernet ports (1 WAN + 4 LAN) give you flexibility most DSL gateways lack. Wire up gaming consoles, desktops, and smart TVs for maximum stability, and use the dedicated WAN port to run the C4000LZ as a standalone router on fiber service.\u003c\/p\u003e\n\n\u003ch2\u003eSecurity and Setup\u003c\/h2\u003e\n\u003cp\u003eModern encryption and security protocols protect your data, and the guided setup wizard gets you online in minutes. Once running, the built-in management interface lets you customize settings, monitor connected devices, and adjust your network in a few clicks.\u003c\/p\u003e\n\n\u003ch2\u003eGreenWave C4000LZ Specs at a Glance\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003exDSL (CenturyLink DSL) and fiber via WAN port\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWiFi\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWiFi 6 (802.11ax), dual-band 2.4 GHz and 5 GHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Speeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 2.5 Gbps download, 1 Gbps upload, depending on plan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEthernet Ports\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e5x Gigabit (1 WAN + 4 LAN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNetwork Features\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSmart Connect band steering, Dynamic QoS, single SSID\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackward Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e802.11 a\/b\/g\/n\/ac devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAntennas\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFixed internal antenna system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRenewed, professionally inspected and tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eSave on Modem Rental Fees\u003c\/h2\u003e\n\u003cp\u003eCenturyLink and Brightspeed charge around $15 per month to lease a gateway, which is $180 a year for equipment you could own. At its current price, this renewed C4000LZ pays for itself in about six months, and everything after that is savings. If your rented gateway is aging or dropping connections, our guide on \u003ca href=\"https:\/\/www.modemguides.com\/blogs\/modemguides-blog\/how-long-do-modems-last-signs-to-replace\"\u003ehow long modems last\u003c\/a\u003e covers the signs it is time to replace it.\u003c\/p\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGreenWave C4000LZ modem router (Renewed)\u003c\/li\u003e\n\u003cli\u003eDSL cord\u003c\/li\u003e\n\u003cli\u003eEthernet cable\u003c\/li\u003e\n\u003cli\u003ePower cord\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Buy the GreenWave C4000LZ from ModemGuides\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e90-day full coverage warranty\u003c\/strong\u003e on every modem we sell, including this renewed C4000LZ.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSA-based customer service and tech support\u003c\/strong\u003e staffed by people who actually know networking gear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast shipping from US warehouses\u003c\/strong\u003e, so most orders arrive in 1 to 3 business days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCurated, ISP-compatible inventory:\u003c\/strong\u003e we only stock modems and routers that are approved on real plans, with clear compatibility notes on every listing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetup and troubleshooting guides\u003c\/strong\u003e available across ModemGuides.com to help you get online without the runaround.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmall US business\u003c\/strong\u003e that puts customer experience first, with real humans answering your questions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eGreenWave C4000LZ Frequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eIs the GreenWave C4000LZ compatible with CenturyLink?\u003c\/h3\u003e\n\u003cp\u003eYes. The C4000LZ is built for CenturyLink and works with both DSL and fiber-optic deployments, using its DSL port for copper plans and its dedicated WAN port for fiber.\u003c\/p\u003e\n\n\u003ch3\u003eDoes the GreenWave C4000LZ work with Brightspeed?\u003c\/h3\u003e\n\u003cp\u003eThe C4000LZ is used on Brightspeed service in the former CenturyLink territories Brightspeed now operates. If you are a Brightspeed customer, confirm the C4000LZ is approved for your plan and address before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is the difference between the C4000LG and C4000LZ?\u003c\/h3\u003e\n\u003cp\u003eBoth are WiFi 6 gateways in GreenWave's C4000 family. Based on our listings, the C4000LZ supports higher speeds (up to 2.5 Gbps download versus 1 Gbps) and adds a fifth Gigabit port as a dedicated WAN, making it the stronger pick for fiber and top-tier plans. The C4000LG covers standard single-line DSL plans up to 1 Gbps at the same price point. Both work on CenturyLink and Brightspeed service.\u003c\/p\u003e\n\n\u003ch3\u003eCan the C4000LZ be used with CenturyLink fiber?\u003c\/h3\u003e\n\u003cp\u003eYes. The dedicated Gigabit WAN port lets the C4000LZ run as a standalone router on fiber deployments. Fiber setups vary by address, so confirm with your provider before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eIs the C4000LZ a modem and a router?\u003c\/h3\u003e\n\u003cp\u003eYes. The C4000LZ is an all-in-one gateway with a built-in WiFi 6 router, so you do not need any separate hardware to get online.\u003c\/p\u003e\n\n\u003ch3\u003eWhat is Smart Connect?\u003c\/h3\u003e\n\u003cp\u003eSmart Connect broadcasts one network name and automatically assigns each device to the 2.4 GHz or 5 GHz band with the best signal, so you never have to choose bands manually or juggle multiple network names.\u003c\/p\u003e\n\n\u003ch3\u003eWill older WiFi devices work with the C4000LZ?\u003c\/h3\u003e\n\u003cp\u003eYes. The C4000LZ is backward compatible with 802.11 a\/b\/g\/n\/ac, so older laptops, phones, and smart home devices connect right alongside newer WiFi 6 hardware.\u003c\/p\u003e\n\n\u003ch3\u003eIs this C4000LZ new or refurbished?\u003c\/h3\u003e\n\u003cp\u003eThis C4000LZ is a Renewed unit that has been professionally inspected and tested, backed by our 90-day full coverage warranty.\u003c\/p\u003e\n\n\u003ch3\u003eWhat happens if the modem stops working?\u003c\/h3\u003e\n\u003cp\u003eIf anything goes wrong within the first 90 days, contact our USA-based support team and we will troubleshoot, replace, or refund. We stand behind every modem we ship.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\n\u003cstyle\u003e\n.mg-product-desc h2 {\n  font-size: 1.25rem;\n  line-height: 1.3;\n  margin: 1.5em 0 0.5em;\n  font-weight: 700;\n}\n.mg-product-desc h3 {\n  font-size: 1.05rem;\n  line-height: 1.3;\n  margin: 1.25em 0 0.4em;\n  font-weight: 600;\n}\n.mg-bulk-callout {\n  border: 1px solid rgba(128, 128, 128, 0.35);\n  border-radius: 6px;\n  padding: 0.75em 1em;\n  margin: 0 0 1.25em;\n  background: rgba(128, 128, 128, 0.08);\n}\n.mg-bulk-callout p {\n  margin: 0;\n}\n\u003c\/style\u003e","brand":"Greenwave","offers":[{"title":"Refurbished","offer_id":45509197004886,"sku":"DMR424R-FBA","price":88.49,"currency_code":"USD","in_stock":true},{"title":"Used - Like New","offer_id":45509197037654,"sku":"DMR424B-LN-FBA","price":88.49,"currency_code":"USD","in_stock":false},{"title":"Used - Very Good","offer_id":45509197070422,"sku":"DMR424B-FBA","price":88.49,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/9463\/2534\/files\/Untitled_design_118.png?v=1760470286","url":"https:\/\/www.modemguides.com\/products\/greenwave-c4000lz","provider":"ModemGuides","version":"1.0","type":"link"}