Verizon Fios network profile

US Residential provider in United States. Fiber-heavy US residential network operated by Verizon.

Verizon Fios is one of the major US Residential providers tracked in this directory, with operations in United States. This profile page covers Verizon Fios's primary ASN references (AS701), common coverage locations, and the diagnostic context most useful when an IP lookup, ASN result, or traceroute attributes a public address to Verizon Fios. 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: Verizon Fios
Category: US Residential
Country/Region: United States
Known ASNs: AS701

How to use this page

Use this profile when an IP lookup shows Verizon Fios 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

Verizon Fios ASN references

AS701 details

Verizon Fios 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.

Verizon Fios is more useful than mobile-carrier results for fixed-access context, but it should still be distinguished from wireless or broader Verizon infrastructure with ASN and PTR checks.

Treat residential ISP matches as provider context, not proof of one subscriber, building, or precise neighborhood.
Start with AS701 as the expected ASN family before assuming the provider result is final.
When the decision is important, combine Verizon Fios with reverse DNS, WHOIS / RDAP, and blacklist context instead of relying on one data source.

Best follow-up checks

Verizon Fios 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 Verizon Fios traffic.

Related tools

Verizon Fios: the major Northeast US fiber broadband network

Verizon Fios is the residential fiber broadband brand of Verizon Communications. Fios launched in 2005 and was the first major fiber-to-the-home rollout by a US incumbent telco. The buildout spanned the Northeast United States - New York, New Jersey, Massachusetts, Connecticut, Rhode Island, Pennsylvania, Delaware, Maryland, Virginia, and Washington DC. The franchise-by- franchise nature of the buildout (negotiated with individual local jurisdictions) produced a coverage footprint that is patchy in geographically specific ways: some neighborhoods have Fios because their local government approved a Verizon franchise; adjacent neighborhoods may not have received Fios because their jurisdiction did not.

Verizon Communications itself has a complex corporate history. The company was formed from the 2000 merger of Bell Atlantic and GTE, with subsequent acquisitions of MCI (2006) and earlier divestitures spinning off Idearc (later FairPoint and Frontier transactions). Today Verizon’s wireline operations - which include Fios - continue to operate alongside the much larger Verizon Wireless business. The wireline and wireless networks produce different IP-attribution signatures despite sharing the Verizon corporate brand, which is the single most important caveat for IP investigations involving Verizon-branded ranges.

AS701, AS22394, and the Verizon wireline backbone

The dominant ASN for Verizon Fios traffic is AS701, the historic Verizon Business backbone (formerly UUNET, acquired through the MCI transaction). AS701 carries Fios residential and small business traffic alongside enterprise services across the Verizon Communications footprint. Some Fios allocations - particularly older ranges from the original buildout era - are visible under AS22394. Verizon Wireless cellular traffic announces from a completely different ASN, AS6167 (Cellco Partnership), so a "Verizon" lookup needs ASN-level disambiguation to determine whether it represents Fios wireline or cellular service.

The wireline-versus-wireless distinction is the most consequential ASN-level question on Verizon IPs. A Fios DC residential subscriber and a Verizon Wireless cellular customer in the same neighborhood appear in lookups as completely different networks despite both being Verizon customers. Cross-checking through ASN Lookup clarifies which Verizon service tier an IP represents. For Fios-specific work, AS701 plus afios.verizon.net PTR is the standard residential signature.

Symmetric fiber architecture and Fios service tiers

The defining architectural feature of Fios is symmetric upload and download capacity, an early advantage over cable competitors that the network has retained through successive speed upgrades. Current Fios tiers include 1 Gbps symmetric, 2 Gbps symmetric (where the underlying ONT supports it), and 5 Gbps symmetric in select markets. Even on lower-tier plans, the upload-to- download ratio is much higher than cable competitors, which produces traffic signatures that look like business connections on networks where residential customers typically have heavily asymmetric capacity.

The symmetric architecture has lookup implications. A Fios residential IP showing sustained heavy upload behavior is normal and does not indicate a business tier reassignment. The same upload pattern on a Comcast or Spectrum residential address would be unusual enough to flag for inspection. Mail volume, video upload activity, gaming streamer traffic, and remote work upload patterns are all routine on Fios in ways they are not on cable residential service. Investigators applying cable-derived heuristics to Fios traffic produce false positives because the underlying network architecture is different.

ONT architecture and IP-assignment stability

Fios service architecture differs structurally from cable. Verizon installs an Optical Network Terminal (ONT) at the subscriber premises that converts fiber to copper Ethernet, with the customer’s router behind the ONT. The ONT does not have a public IP - the public IP is assigned to the customer router. This separation produces specific operational behaviors: a power outage at the home leaves the ONT offline while Verizon’s upstream remains fully functional, producing what looks like a single-user outage while neighbors stay online.

For dynamic IP behavior, the Fios architecture produces more stable assignments than cable competitors. Subscribers often retain the same public IPv4 address for weeks or months between changes because DHCP leases are long and ONT reboots alone usually don’t trigger reassignment. This stability affects how IP reputation systems treat Fios addresses - they develop and retain reputation characteristics tied to individual subscribers more persistently than cable IPs that rotate more frequently. A Fios IP appearing repeatedly in security logs over weeks likely represents the same subscriber across sessions, which is a useful characteristic for legitimate reputation tracking and also a useful signal for fraud detection.

PTR patterns and Fios hostname recognition

Fios residential connections return PTR records in the pattern pool-IP.market.fios.verizon.netwhere market is a metro identifier - for example washdc for the Washington DC metro, nycmny for New York City Manhattan,bstnma for Boston Massachusetts. Thefios string in the hostname is the cleanest signal that the address belongs to the Fios residential footprint rather than to Verizon’s business or backbone allocations.

Static IP and business Fios use different naming patterns. Common formats include hostnames containingstatic, biz, or business-class identifiers, sometimes resolving to verizon-gni.net infrastructure. Business static allocations may have customer-configured PTR records through Verizon’s static IP service, producing hostnames that look entirely unlike standard Fios residential patterns. The WHOIS / RDAP record identifies the customer organization for reassigned static allocations, clarifying whether a Fios address represents consumer service or a business tier.

Mail reputation and outbound mail behavior on Fios

Verizon Fios takes a more permissive approach to outbound residential mail than Comcast or Charter. Port 25 is not uniformly blocked on Fios residential connections, although Verizon does maintain mail-abuse detection that can throttle or block outbound mail when patterns suggest spam activity. The practical effect is that Fios residential ranges can host small outbound mail servers - unusual among major US residential ISPs.

Fios mail reputation is generally stronger than cable competitors’ for several structural reasons. The symmetric upload capacity supports legitimate outbound mail volumes that residential cable physically cannot sustain. The Fios customer demographic in major Northeast metros skews more professional than the broader US residential broadband baseline, producing less spam-correlated outbound mail traffic. A Fios IP on a spam blocklist is therefore unusual and worth investigating specifically - it often indicates a compromised home device or an exposed mail relay rather than baseline abuse. Validate specific reputation through IP blacklist check and inspect reverse DNS through reverse DNS lookup to determine subscriber tier.

Mature IPv6 deployment across the Fios footprint

Verizon Fios was one of the first major US ISPs to roll out native IPv6 to residential subscribers at scale. Fios subscribers today routinely receive both an IPv4 address and a delegated IPv6 prefix (commonly a /56) from Verizon’s IPv6 allocations. The maturity is meaningful because it makes Fios one of the cleanest demonstrations of functional dual-stack residential broadband in the US.

For privacy and VPN-related work, the mature IPv6 deployment means a Fios user’s full network identity cannot be captured by IPv4 alone. Any privacy-related analysis needs IPv6 awareness to be complete. Fios subscribers more readily encounter real-world IPv6 services - IPv6-first cloud workloads, IoT devices, modern gaming infrastructure - than subscribers on legacy-only networks. Running our IPv6 leak test produces a clearer signal on Fios than on IPv6-immature networks because the leak surface actually exists. A Fios subscriber whose VPN fails to handle IPv6 will leak real IPv6 traffic through Verizon directly even when IPv4 looks clean - the canonical silent leak pattern on dual-stack residential networks.

Verizon broader corporate strategy and Fios footprint expansion

Fios sits inside the much larger Verizon Communications portfolio, which today emphasizes wireless and 5G as primary growth investments. Wireline operations including Fios have shifted from active geographic expansion to footprint optimization within the existing Northeast service area. Verizon Home Internet (5G fixed wireless) has become the primary tool for Verizon to reach residential customers outside the Fios franchise footprint - similar to AT&T Internet Air and T-Mobile Home Internet, the 5G product serves households that cannot get Fios because the local jurisdiction never approved the franchise.

This dual-product structure produces specific lookup artifacts. A Verizon residential customer in a Fios market shows Fios attribution (AS701, fios.verizon.net PTR). A Verizon Home Internet customer in a non-Fios market shows cellular attribution (AS6167 or wireless- related ASNs, with CGNAT-style behavior). Both are legitimate Verizon residential services, but the underlying network is completely different. Investigators correlating "Verizon residential" traffic should distinguish these two paths because their performance characteristics, IP stability, and CGNAT presence vary substantially. The Fios path is the traditional broadband signature; the 5G Home Internet path is closer to mobile-style behavior despite being marketed as residential service. Verify the specific service through ASN identity rather than relying on the Verizon brand label alone.

Fios lookup limits and franchise-buildout caveats

Fios lookup attribution carries a structural caveat specific to the franchise-buildout history. The coverage map is patchy in geographically specific ways that the city label alone does not capture. A "New York" or "Washington" Fios lookup represents a subscriber inside the franchise footprint, which excludes specific neighborhoods where Verizon never built Fios. For jurisdictional precision, the franchise pattern is actually a useful indirect signal - a Fios IP almost always represents a subscriber inside one of the jurisdictions that approved the original Verizon franchise.

Beyond the buildout caveat, Fios lookups share the single-household limitation common to all residential broadband. The address identifies the subscription, not any individual user. The professional/federal/government- contractor demographic concentration in markets like DC and Boston produces unusual traffic patterns - federal cloud routing, contractor VPN tunnels, professional remote work - that are routine on Fios in ways that would be unusual on other residential networks. Treating an individual Fios IP as evidence of any specific demographic profile (federal employee, contractor, professional) is unsound. The customer base is broadly mixed; the network identifies the subscription, not the subscriber profile. For consequential workflows, layer ASN identity, PTR examination, and current WHOIS / RDAP before drawing operational conclusions.

Verizon support, abuse paths, and Fios technical contacts

Verizon support paths for Fios follow standard residential consumer channels, with abuse-related issues routing through abuse@verizon.net for the consumer side. Static IP requests on Fios are typically handled through the Fios Business product tier rather than as one-off residential modifications - the residential consumer model assumes dynamic allocation and does not accommodate persistent IP-hold requests in the way business accounts do. Port forwarding configuration is available through the standard Fios router interface for customers using Verizon-provided equipment.

For mail reputation and PTR alignment specifically, Verizon maintains separate handling for Fios versus Verizon Business. The Fios residential support tier rarely escalates blocklist or PTR issues directly; the effective path is upgrading to Fios Business or leveraging the existing residential reputation characteristics described above. Verizon Business static-IP customers have direct paths to coordinate PTR alignment, manage outbound mail policy, and engage with third-party blocklist operators’ delist procedures. Identifying the service tier through ASN, PTR pattern, and WHOIS / RDAP examination determines which Verizon support path applies to a specific Fios-attributed IP.

Quick reference summary for Verizon Fios lookups

The high-confidence Fios identification recipe is AS701 (or AS22394) plus a fios.verizon.net PTR plus a Northeast US metro geolocation. That trio is reliable for residential Fios attribution. Symmetric upload capacity is the architectural marker that distinguishes Fios from cable; mature IPv6 deployment is structural to the network rather than optional; franchise-buildout history explains coverage gaps that the city label alone cannot. For investigators, the practical rule is that a Fios IP is one of the most technically clean residential broadband signals in the US - stable assignments, mature dual-stack, professional demographic baseline, low spam reputation - and that cleanness can be leveraged in everyday workflows. For consequential decisions, the standard layered evidence approach still applies: confirm ASN, examine PTR, validate current WHOIS / RDAP, and treat attribution as one signal in a broader evidence chain.

For deeper market-level context on the most active Fios metros, pair this provider profile with our enriched city page for Verizon Fios Washington DC - the DC metro is one of the highest-density Fios footprints in the network and concentrates the federal market, Ashburn peering, and franchise-buildout characteristics described throughout this profile. For everyday IP lookup workflows, the provider profile alone is sufficient; for metro-specific investigations in the federal market, the paired city page adds genuinely useful operational context. The Fios footprint is the cleanest example in US residential broadband of what mature fiber-to-the-home looks like from an IP attribution perspective, and the DC metro is the densest example of that footprint in operation today.

What ASN does Verizon Fios use?

Verizon Fios may use one or multiple ASNs depending on region and service type. This page lists common references for quick investigation.

Can Verizon Fios 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 Verizon Fios 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 Verizon Fios 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.