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Cox Communications network profile

US Residential provider in United States. Regional-to-national US cable ISP with significant suburban coverage.

Cox Communications is one of the major US Residential providers tracked in this directory, with operations in United States. This profile page covers Cox Communications's primary ASN references (AS22773), common coverage locations, and the diagnostic context most useful when an IP lookup, ASN result, or traceroute attributes a public address to Cox Communications. Use it as a starting point for ASN, WHOIS, and reverse DNS validation rather than as a standalone proof of identity or location.

At a glance

Provider
Cox Communications
Category
US Residential
Country/Region
United States
Known ASNs
AS22773

How to use this page

Use this profile when an IP lookup shows Cox Communications or a related ASN. It gives quick context before deeper routing and ownership checks.
  • Map the IP to ASN in the ASN lookup tool.
  • Validate reverse DNS and WHOIS ownership details.
  • Compare with blacklist status for reputation checks.

Common coverage locations

    Cox Communications ASN references

    Cox Communications investigation notes

    US residential broadband networks usually rely on dynamic address pools and metro-level aggregation, so a provider match is often stronger than an exact city label.

    Cox routes often reflect regional cable market hubs, so an IP can map cleanly to the provider while still being less precise at the city or suburb level.

    • Treat residential ISP matches as provider context, not proof of one subscriber, building, or precise neighborhood.
    • Start with AS22773 as the expected ASN family before assuming the provider result is final.
    • When the decision is important, combine Cox Communications with reverse DNS, WHOIS / RDAP, and blacklist context instead of relying on one data source.

    Best follow-up checks

    Cox Communications troubleshooting workflow

    Start with IP to ASN mapping, then verify reverse DNS and WHOIS ownership. For email and abuse workflows, add blacklist checks to assess IP reputation signals around Cox Communications traffic.

    Related tools

    Cox Communications: the third-largest US cable broadband operator

    Cox Communications is the third-largest residential cable broadband operator in the United States, serving approximately 5 million residential broadband subscribers and several hundred thousand business connections across 18 states. The company is privately held - a major operational and strategic distinction from publicly traded Comcast and Charter - as a subsidiary of Cox Enterprises, which has been controlled by the Cox family since 1898. The Atlanta-headquartered parent company also operates Cox Automotive (Kelley Blue Book, Autotrader, Manheim) and other media businesses independent of the broadband operation.

    Cox’s footprint covers distinct metropolitan markets rather than continuous regional territory. Major Cox markets include Phoenix, Arizona; San Diego and Orange County, California; Las Vegas, Nevada; Oklahoma City and Tulsa, Oklahoma; New Orleans and Baton Rouge, Louisiana; Hampton Roads, Virginia; Wichita, Kansas; Omaha, Nebraska; and several smaller markets across the Southeast. The discontinuous footprint means Cox does not compete with itself across regions but does compete vigorously with the dominant operator in each individual market - typically Comcast or Spectrum elsewhere in the same state but not in Cox-served metros specifically.

    AS22773 and the Cox routing identity

    The dominant ASN for Cox Communications residential and small business traffic is AS22773, registered as Cox Communications Inc. AS22773 announces the substantial majority of Cox’s public IPv4 and IPv6 address space and is the ASN most lookups return when an IP belongs to typical residential Cox service. Adjacent Cox ASNs handle specific traffic classes and business allocations, but AS22773 dominates everyday lookups.

    The single-ASN concentration is operationally simpler than Comcast’s or Charter’s multi-ASN structures and makes Cox lookups slightly more straightforward. A residential or small business Cox IP will almost certainly return AS22773; business and enterprise tier IPs may return adjacent Cox ASNs but the brand identification remains unambiguous. Confirming the announcing ASN through ASN Lookup is straightforward, and the ASN family does not span merger inheritance the way Charter Spectrum’s does. Cox has grown primarily through organic expansion rather than acquisition.

    DOCSIS technology and Cox service tiers

    Cox’s underlying access technology is DOCSIS-based hybrid fiber-coaxial cable, comparable to Comcast and Spectrum. The bulk of the footprint runs DOCSIS 3.1 with gigabit-class service available in most markets. Cox has been measured rather than aggressive in DOCSIS 4.0 deployment, with limited pilot activity rather than broad rollout. The residential service tiers (Essential, Preferred, Ultimate, Gigablast) offer different download speeds but follow the standard US cable pattern of asymmetric upload-to-download ratios on consumer tiers.

    Cox Business and Enterprise tiers offer symmetric Ethernet over HFC and direct fiber options in markets where the network supports it. Cox’s business connectivity arm is meaningfully larger as a share of total revenue than at Comcast or Spectrum, partly because the smaller residential base puts more proportional weight on business connections. For lookup workflows, the structural implications match the broader US cable pattern: asymmetric upload signatures on most residential addresses, symmetric upload on business tier reassignments visible in WHOIS / RDAP as customer organizations rather than Cox directly.

    Cox PTR conventions and hostname patterns

    Cox residential PTR records typically follow a pattern similar to other US cable operators but with Cox- specific market codes. Common formats include ip-IP.market.cox.net where market identifies the regional service area - az for Arizona, ca for California, la for Louisiana, and so on. Some legacy ranges resolve under variants of cox.net with market identifiers reflecting the specific metro within a state. Business Cox uses the coxbusiness.com family of hostnames, producing PTR records that visibly distinguish business from residential service.

    The PTR pattern recognition is particularly useful for Cox because the discontinuous footprint means a "Cox" IP lookup combined with a market-specific PTR code is a high-confidence localization signal. A Cox PTR with theaz market code is almost certainly in the Phoenix metro because that is the dominant Arizona Cox presence. A Cox PTR with la almost certainly represents New Orleans or Baton Rouge service area. The combination of ASN, brand, and market code produces more reliable Cox attribution than the same combination produces for nationwide operators with overlapping market codes.

    Email policy and Cox outbound mail reputation

    Cox applies port 25 blocking on residential lines consistent with the rest of the major US cable industry. Residential Cox customers cannot send direct SMTP on port 25, with the traffic dropped at the access network before reaching the public internet. Business accounts can request unblocking. The structural implications for mail forensics match Comcast, Charter, and AT&T: mail attributed to Cox residential ranges via port 25 should be treated as misattributed or as originating from authenticated relays or non-standard ports.

    Cox residential reputation is generally clean compared to the broader US residential baseline, partly because the network footprint covers a relatively defined set of metropolitan markets with consistent operations. Cox also publishes feedback loops and postmaster resources for legitimate mail operators. A Cox residential IP on a blocklist usually indicates a compromised home device or a prior tenant of the IP range rather than ongoing network-wide abuse. Validate through IP blacklist check before drawing conclusions about specific Cox addresses, and cross-check with reverse DNS to determine service tier.

    Cox Mobile, IPv6 status, and emerging product mix

    Cox launched Cox Mobile as an MVNO in 2023, several years after Comcast and Charter launched Xfinity Mobile and Spectrum Mobile respectively. Cox Mobile rides on Verizon Wireless backhaul, following the same wholesale pattern as the other major cable MVNOs. The lookup implication matches Xfinity Mobile and Spectrum Mobile: Cox Mobile cellular traffic appears in lookups as Verizon Wireless (AS6167) rather than as Cox, while the same device on home Cox Wi-Fi shows as Cox (AS22773). The dual-network attribution pattern is now a standard MVNO artifact across all three major US cable operators.

    Cox’s IPv6 deployment has been broadly comparable to Charter’s - present in most markets but with some variability depending on customer-premises equipment and provisioning history. Residential subscribers generally receive IPv6 prefix delegation, though specific older lines may remain IPv4-only. The unevenness has direct implications for VPN testing: a Cox subscriber running an IPv6 leak test on a line that never had IPv6 in the first place produces a "no IPv6" result that is not evidence of VPN success. Run our IPv6 leak test to determine IPv6 presence on the specific line before interpreting leak results.

    Cox market characteristics and competitive landscape

    Cox’s discontinuous footprint produces distinctive market dynamics. In Phoenix, Cox competes primarily with CenturyLink (now Lumen) and T-Mobile Home Internet for residential service. In San Diego and Orange County, the competitor is AT&T Fiber and Spectrum in adjacent markets. Las Vegas Cox competes with CenturyLink and T-Mobile. New Orleans Cox is the dominant operator with limited competition. Each market has a different competitive context, which produces different baseline behavior in IP attribution.

    The private ownership structure also shapes operational characteristics that affect IP attribution indirectly. Cox does not face quarterly shareholder pressure, which has historically produced more measured technology transitions and fewer dramatic market shifts than at publicly traded competitors. Cox addresses tend to be relatively stable in attribution over time, with consistent ASN assignments, predictable PTR patterns, and durable market boundaries. For long-running investigations or reputation tracking, this stability is a useful operational characteristic - a Cox IP attributed three years ago is more likely to still be attributed to Cox in the same market today than the equivalent IP on a more dynamic public network.

    Cox Business, Hospitality, and the private-company operational character

    Cox’s commercial business has historically been a proportionally larger share of the company’s revenue than at Comcast or Charter. Cox Business serves small-to-mid-market customers with dedicated internet, hosted voice, managed networks, and security services. Cox Hospitality is a separate division serving hotels, resorts, and large-property customers - a distinctive Cox specialty given the company’s strong footprint in Las Vegas, Phoenix, and tourist-heavy markets like New Orleans. The Hospitality business operates dedicated IP allocations and produces lookup signatures that look unlike standard residential or small-business Cox service.

    The private ownership structure shapes operational characteristics in ways that affect IP attribution indirectly. Cox does not face quarterly shareholder pressure to demonstrate growth metrics, which has historically produced more measured technology transitions and longer planning horizons. Network changes propagate more deliberately, IP allocation changes are less frequent, and overall infrastructure evolution moves at a steadier pace than at publicly traded competitors. For investigations and reputation tracking, this means Cox addresses tend to be unusually stable in attribution over time. A Cox IP attributed three years ago is more likely to still be attributed to Cox in the same metro market today than the equivalent IP on a more dynamic public network. Time-series reputation data on Cox ranges therefore carries more durability than equivalent data on comparable networks.

    Cox lookup limits and the market-specific caveat

    Cox lookups carry the same structural single-household limitation common to all residential broadband. The IP identifies the subscription, not individual users within the household. The discontinuous footprint adds a specific caveat: Cox IPs are heavily concentrated in specific metropolitan markets, so any database that attributes a Cox IP to a state where Cox does not operate is producing an error. A "Cox in Chicago" attribution is wrong - Comcast serves Chicago. A "Cox in Boston" attribution is wrong - Charter Spectrum serves Boston. The market boundaries are well-defined and should be treated as authoritative when validating lookup results.

    Beyond the geographic constraint, Cox addresses share the limits of all residential broadband attribution: network-layer evidence cannot identify individual users, detailed personal location, or specific household composition without external evidence sources. For consequential decisions involving abuse, fraud, or access control, the Cox IP lookup is a starting point for additional inquiry rather than an endpoint conclusion. Layer ASN identity, market-code-aware PTR examination, geolocation confirmation against the Cox footprint, and current WHOIS / RDAP context before treating any Cox-attributed IP as evidence in any decision with real-world consequences. The IP is one signal in a larger evidence chain, never the chain itself.

    Cox support, abuse handling, and operational practices

    Cox support follows a tier structure with relatively high engagement on technical IP issues compared to the larger publicly traded operators. Cox Business customers have direct named contacts for static IP allocation, port forwarding, abuse-list remediation, and PTR alignment requests. The smaller residential base and private ownership structure produce shorter escalation paths than at competitors of comparable absolute size, which can matter for businesses navigating reputation issues or technical setup questions.

    For abuse and reputation paths, Cox maintains abuse@cox.net as the primary contact, with regional postmaster resources for mail-specific issues. Cox’s consumer mail reputation is generally well- maintained, and the abuse team has historically been responsive to legitimate sender complaints and delist evidence packages from Cox Business customers. The defined market boundaries also help: an issue traced to a specific Cox metro can be coordinated with regional operations staff rather than routed through a generic national escalation tree. Identifying the service tier through ASN, market-coded PTR examination, and WHOIS / RDAP determines which Cox support path applies and whether the IP represents residential, business, or specialized hospitality service - each tier has different operational characteristics and different escalation routes for technical issues.

    Quick reference summary for Cox Communications lookups

    The high-confidence Cox identification recipe is AS22773 plus a cox.net-family PTR with a market code plus geolocation in one of Cox’s defined metropolitan footprints (Phoenix, San Diego, OC, Las Vegas, Oklahoma City, New Orleans, Hampton Roads, Wichita, Omaha, or other Cox metros). A Cox attribution outside these market boundaries should be treated skeptically because the discontinuous footprint makes such results structurally unlikely. The private ownership model, longer operational planning horizons, and stable IP attribution over time make Cox a relatively predictable network for reputation tracking and time-series investigation. Like all residential broadband, the IP identifies the household subscription rather than any individual user, and consequential decisions still require layered evidence beyond network-only attribution - ASN identity, PTR pattern, current WHOIS / RDAP context, and application-layer signals before treating any Cox-attributed lookup as evidence in real-world workflows.

    Among the major US cable operators, Cox is the cleanest example of a regional operator with consistent market-by-market operations. The discontinuous footprint, private ownership, and emphasis on commercial and hospitality services produce a network profile that is unusually stable and predictable for everyday IP attribution workflows. For long-running investigations, reputation tracking, and historical IP attribution, Cox’s operational stability is an asset that the larger and more dynamic publicly-traded competitors cannot match.

    Cox Communications FAQ

    What ASN does Cox Communications use?
    Cox Communications may use one or multiple ASNs depending on region and service type. This page lists common references for quick investigation.
    Can Cox Communications IP addresses change location results?
    Yes. Geolocation can vary by database and routing design, especially on mobile or CGNAT-heavy networks.
    How should I verify ISP ownership?
    Cross-check ASN mapping with WHOIS/RDAP and reverse DNS to reduce false assumptions from one data source.
    Is Cox Communications enough to identify an exact user location?
    No. The ISP name is provider context. Exact location and subscriber-level identity require stronger evidence than public lookup data can provide.
    Why do Cox Communications lookup results sometimes show nearby cities?
    Provider aggregation, dynamic address pools, mobile gateways, and stale geolocation records can all make a correct ISP match appear under a nearby city.